An organ is defined as a specialised structure which is composed of different tissues that join together as a unit to perform a specific function. Multiple Human Body Organs that carry out similar functions are grouped together to form organ systems.
The human body contains several vital organs, including the brain, heart, lungs, liver, pancreas, kidneys, and intestines. Other organs, such as the spleen, thymus gland, and adrenal glands, also play important roles in the body’s overall function. Additionally, the skin, eyes, ears, nose, and tongue are considered organs as well.
he average adult has somewhere between 30 – 40 trillion cells, and an estimated 242 billion new cells are produced every day. When a select group of cells with similar functions come together, it forms a tissue.
Tissues cumulate into organs, group of organs form organ systems and eventually, a complete organism.
Cells -> Tissues -> Organs -> Organ System -> Organism
Human Physiology
- Circulatory System
- Digestive System
- Reproductive System (Male, Female)
- Respiratory System
- Nervous System
Female Reproductive System:
The female reproductive system is made up of the internal and external sex organs that function in the reproduction of new offspring. In humans, the female reproductive system is immature at birth and develops to maturity at puberty to be able to produce gametes, and to carry a fetus to full term.
Male Reproductive System:
The male reproductive system consists of a number of sex organs that play a role in the process of human reproduction. These organs are located on the outside of the body and within the pelvis.
- Penis
- Urethra
- Scrotum
- Testicle
- Seminal Vesicle
- Vas Deferens
Nervous System:
In biology, the nervous system is the highly complex part of an animal that coordinates its actions and sensory information by transmitting signals to and from different parts of its body.
- Brain
- Spinal Cord
- Nerves
- Ganglia
Central Nervous System
- Meninges
- Pia
- Arachnoid
- Dura
- Brain
- Frontal lobe
- Parietal lobes
- Temporal lobes
- Occipital lobe
- Brainstem
- Midbrain
- Pons
- Medulla
- Other regions
- Thalamus
- Hypothalamus
- Pituitary
- Hippocampus
- Amygdala
- Papez circuit & Limbic System
- Basal Ganglia
- Cerebellum
- Spinal cord
Peripheral Nervous System:
- Spinal nerves
- Cranial nerves
Facial Organs:
- Eyes
- Ears
- Nose
- Salivary & Lacrimal Glands
- Tongue & Mouth
Pelvis & External Genitalia:
- Bladder
- Urethra
List of Organs and Parts of Body
| Organ Name | Descriptions |
|---|---|
| Adrenal glands | The adrenal glands are small, triangular-shaped glands located on top of each kidney. |
| Alveoli | |
| Anus | The anus is the opening at the end of the digestive tract where feces are expelled from the body. |
| Appendix | The appendix is a small, finger-shaped pouch that is attached to the large intestine, located in the lower right side of the abdomen. |
| Arteries | Arteries are blood vessels that transport oxygenated blood away from the heart to the body’s tissues. |
| Bartholin’s gland (in females) | The Bartholin’s glands are two small glands located on either side of the vaginal opening in females. |
| Bladder | The bladder is a muscular organ located in the lower abdomen that stores urine produced by the kidneys before it is eliminated from the body through the urethra. |
| Blood vessels (arteries, veins, and capillaries) | Blood vessels are the tubes that transport blood throughout the body. |
| Bones | Bones are the rigid and strong connective tissues that make up the skeletal system of the body. |
| Brain | The brain is the central organ of the nervous system in the human body. |
| Bronchi | The bronchi are the two primary branches of the trachea (windpipe) that deliver air to the lungs. |
| Bulbourethral gland (in males) | The bulbourethral gland, also known as the Cowper’s gland, is a small gland located in the male reproductive system. |
| Cartilage | Cartilage is a type of connective tissue that is found in various parts of the body, such as the joints, ears, nose, and throat. |
| Cervix (in females) | The cervix is the lower, narrow end of the uterus that connects to the vagina. |
| Circulatory System | The circulatory system is a body-wide network of blood, blood vessels, and the heart, which is responsible for pumping blood and oxygen to the body’s cells and removing waste products. |
| Clitoris (in females) | The clitoris is a small, sensitive organ located at the front of the vulva. |
| Corpus cavernosum (in males) | The corpus cavernosum is a chamber in the penis that fills with blood during an erection, causing the penis to become firm. |
| Cowper’s gland (in males) | The Cowper’s gland, also known as the bulbourethral gland, is a small exocrine gland in males that produces a clear, thin fluid called pre-ejaculate. |
| Digestive System | The digestive system is a group of organs that work together to break down food, absorb nutrients, and eliminate waste. |
| Ears | The ears are the organs of hearing and balance in the body. |
| Ejaculatory duct (in males) | The ejaculatory ducts are the ducts in the male reproductive system that transport semen from the vas deferens and the seminal vesicles to the urethra. |
| Endometrium | The endometrium is the inner lining of the uterus, a reproductive organ in the female reproductive system. |
| Epididymis (in males) | The epididymis is a long, coiled tube located on the back of the testicle. |
| Esophagus | The esophagus is a muscular tube that connects the pharynx (throat) to the stomach. |
| External urethral sphincter (in both males and females) | The external urethral sphincter is a ring-like muscle located around the urethra, the tube through which urine and semen are expelled from the body. |
| Eyeballs | The eyeballs are the spherical structures located within the orbits (eye sockets) of the skull. |
| Fallopian tubes (in females) | The fallopian tubes, also known as the uterine tubes or oviducts, are a pair of narrow, muscular tubes that connect the ovaries to the uterus in the female reproductive system. |
| Female Reproductive System | The female reproductive system is a group of organs that are responsible for the reproduction and development of offspring. |
| Fimbria | The fimbria are finger-like projections that line the opening of the fallopian tubes, which connect the ovaries to the uterus in the female reproductive system. |
| Foreskin (in males) | The foreskin, also known as the prepuce, is a fold of skin that covers the head of the penis in males who are not circumcised. |
| Frenulum (in males) | The frenulum is a small fold of tissue that connects the foreskin (or prepuce) to the underside of the glans (head) of the penis in males. |
| Gallbladder | The gallbladder is a small, pear-shaped organ located just below the liver in the upper right abdomen. |
| Ganglia | Ganglia are clusters of nerve cells, also known as neurons, that are located outside the brain and spinal cord. |
| Gastrointestinal tract | The gastrointestinal (GI) tract, also known as the digestive tract, is the system of organs that is responsible for the digestion and absorption of food in the body. |
| Glans penis (in males) | The glans penis is the rounded head or tip of the penis. |
| Hair | Hair is a protein filament that grows from follicles found in the dermis, or skin. |
| Heart | The heart is a muscular organ that pumps blood throughout the body. |
| Kidneys | The kidneys are a pair of organs located in the back of the abdomen that filter waste products from the blood and excrete them as urine. |
| Labia majora (in females) | The labia majora are the outer, fleshy folds of skin that surround and protect the vaginal opening in females. |
| Lacrimal Glands | The lacrimal glands are a pair of small glands located in the upper outer part of the eye sockets. |
| Large intestine | The large intestine, also known as the colon, is the final part of the digestive system in humans and other mammals. |
| Larynx | The larynx, also known as the voice box, is a part of the respiratory system located in the neck. |
| Liver | The liver is a large, complex organ located in the upper right-hand side of the abdomen. |
| Lungs | The lungs are a pair of organs located in the thoracic cavity of the chest. |
| Lymph nodes | Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. |
| Male Reproductive System | The male reproductive system is a group of organs that are responsible for the production, maturation, and transport of sperm, as well as the production of male sex hormones. |
| Mammary glands (in females) | Mammary glands, also known as breast glands, are the organs that produce milk in females. |
| Mouth | The mouth is the opening in the head of an animal, through which food and air pass. |
| Muscles | Muscles are soft tissue in the body that have the ability to contract and relax. They are responsible for movement, posture, and the generation of heat. |
| Nails | Nails are thin plates of hard keratin, a protein found in hair and skin, that are found on the dorsal surface of the fingers and toes. |
| Nasal Cavity | The nasal cavity is the space inside the nose that is responsible for filtering, warming, and moistening the air that we breathe. |
| Nerves | Nerves are the body’s electrical wiring system, they are responsible for transmitting information throughout the body. |
| Nervous System | The nervous system is the complex network of nerves and cells that transmit signals throughout the body. |
| Nose | The nose is a prominent feature of the face and serves several important functions. |
| Ovarian follicles (in females) | Ovarian follicles are fluid-filled sacs in the ovaries that contain immature eggs. |
| Ovaries (in females) | The ovaries are a pair of reproductive organs located in the female pelvic cavity, one on each side of the uterus. |
| Pancreas | The pancreas is a glandular organ located in the abdomen. It produces enzymes that aid in digestion and hormones that regulate blood sugar levels. |
| Parathyroid gland | The parathyroid glands are four small glands located in the neck, behind the thyroid gland. |
| Penis (in males) | The penis is a male reproductive organ that also serves as the external organ of urination. |
| Peripheral Nervous System | The peripheral nervous system (PNS) is the part of the nervous system that lies outside of the brain and spinal cord. |
| Pharynx | The pharynx is a muscular tube that runs from the back of the nasal cavity to the larynx (voice box) and the esophagus. |
| Pineal Gland | The pineal gland, also known as the pineal body, is a small endocrine gland located in the brain. |
| Pituitary Gland | The pituitary gland, also known as the “master gland,” is a small endocrine gland located at the base of the brain, just below the hypothalamus. |
| Prostate (in males) | The prostate is a gland in the male reproductive system that produces a fluid that makes up part of semen. |
| Prostate gland (in males) | The prostate gland is a small, walnut-shaped gland in the male reproductive system. |
| Pubococcygeus muscle (in both males and females) | The pubococcygeus muscle (PC muscle) is a muscle that is located in the pelvic area of both men and women. |
| Rectum | The rectum is the last portion of the large intestine that connects the colon to the anus. |
| Reproductive Organs (ovaries or testes) | The reproductive organs, also known as the genital organs, are the organs of the reproductive system. |
| Respiratory System | The respiratory system is the group of organs responsible for breathing in humans and other mammals. |
| Salivary Glands | Salivary glands are glands located in the mouth that produce saliva, a clear, watery fluid. |
| Scrotum (in males) | The scrotum is the sac of skin that surrounds the testicles in males. |
| Seminal vesicles (in males) | The seminal vesicles are a pair of glandular organs located just behind the prostate gland that produce a significant portion of the fluid that makes up semen. |
| Sinuses | Sinuses are air-filled spaces in the skull that are located behind the forehead, cheeks, nose, and eyes. |
| Skin | The skin is the largest organ of the human body and has many important functions. |
| Small intestine | The small intestine is a long, narrow tube that connects the stomach to the large intestine. |
| Sperm duct (in males) | The sperm duct, also known as the vas deferens, is a long, muscular tube that carries sperm from the testes to the prostate gland in males. |
| Spleen | The spleen is an organ located in the upper left side of the abdomen, near the stomach and the diaphragm. |
| Stomach | The stomach is a muscular, pear-shaped organ located in the upper part of the abdomen, between the esophagus and the small intestine. |
| Teeth | Teeth are small, hard, white structures located in the mouth. |
| Tendons | Tendons are fibrous connective tissue that attach muscle to bone. |
| Testes (in males) | The testes (also known as testicles) are a pair of male reproductive organs located in the scrotum. |
| Throat | The throat, also known as the pharynx, is a muscular tube that connects the mouth and nose to the esophagus and larynx (voice box). |
| Thymus | The thymus is a small organ located in the chest, behind the sternum and between the lungs. |
| Thyroid gland | The thyroid gland is a butterfly-shaped endocrine gland located in the neck, just below the Adam’s apple. |
| Tongue | he tongue is a muscular organ located in the mouth, responsible for several functions such as taste, swallowing, speech and aiding in oral hygiene. |
| Trachea | The trachea, also known as the windpipe, is a tube-like structure that connects the larynx (voice box) to the lungs. |
| Ureters | The ureters are two thin tubes that connect the kidneys to the bladder |
| Urethra (in both males and females) | The urethra is a tube that carries urine from the bladder to the outside of the body. |
| Urethral sphincter | The urethral sphincter is a ring of muscle that surrounds the urethra and controls the release of urine from the bladder. |
| Uterus (in females) | The uterus (or womb) is a pear-shaped muscular organ located in the pelvic region of females, between the bladder and the rectum. |
| Vagina (in females) | The vagina is a muscular and flexible canal that connects the uterus to the outside of the body in females. |
| Vas deferens (in males) | The vas deferens, also known as the ductus deferens, is a tube that carries sperm from the epididymis to the urethra. |
| Veins | Veins are blood vessels that carry deoxygenated blood back to the heart. |
MCQs ?
What is the largest organ in the human body?
The largest organ in the human body is the skin.
What is the smallest bone in the human body?
The smallest bone in the human body is the stapes, one of the three bones in the middle ear.
What is the function of the pancreas in the human body?
The pancreas is a gland that produces and secretes hormones, including insulin, which regulates blood sugar levels, and enzymes that aid in digestion.
What is the function of the kidney in the human body?
The kidneys are organs that filter waste products and excess fluids from the blood, which are then excreted as urine. They also regulate electrolyte balance and produce hormones that regulate red blood cell production and promote bone health.
What is the function of the spleen in the human body?
The spleen is an organ that acts as a filter for the blood and helps to remove old or damaged red blood cells. It also plays a role in the immune system by producing white blood cells and storing platelets.
What is the function of the gallbladder in the human body?
The gallbladder is a small organ located under the liver that stores and releases bile, a fluid that helps to break down fats in the small intestine during digestion.
What do you understand by human anatomy?
Anatomy is the study of the structure of an object. Human anatomy deals with the way the parts of humans interact to form a functional unit.
What do you understand by human physiology?
Human physiology deals with the mechanical, biochemical, and physical functions of human beings. It serves as the foundation of modern medicine. It is the study of the functioning of human organs.
Who is the father of human physiology?
Claude Bernard is the father of human physiology. He is also known as the father of modern experimental physiology.
What is the importance of human physiology?
Human physiology lays the foundations on which our knowledge of life is built. It helps us to know how to treat illnesses and how to handle the stress that different environments place on us.
Who is the father of human anatomy?
Andreas Vesalius is known as the father of human anatomy. He was born in Belgium into a family of doctors. His most famous work, Fabrica by Andreas Vesalius garnered wide acclaim.
What are the different types of anatomy?
There are two different types of anatomy: gross anatomy and microscopic anatomy. Gross anatomy deals with things that can be seen with the naked eye, while microscopic anatomy deals with things that can only be seen under a microscope.
How important is human anatomy?
Human anatomy helps us understand the structure and relationship of all parts of the body. It also helps us to know the characteristics of the different parts of the body.
How are anatomy and physiology different?
Anatomy helps us to know the structure of the different parts of the body while physiology studies the functions and relationships of the parts of the body.
What are the important organs of the human body?
Major organs of the body include the brain, lungs, heart, kidneys, liver, stomach, intestines, and bladder.
What are the different systems of our body?
The different systems of our body include: cardiovascular system, endocrine system, digestive system, respiratory system, excretory system, lymphatic system, nervous system, muscular system, and skeletal system.
