Question

draw and describe about various types of human cells .

Answer 1

Bone cells:

They are the most robust body cell systems and are bound together by calcium and phosphate. As you know, they give strength, support, and framework to the body by enclosing organs in the skeletal system, i.e., bones.

2. Cartilage cells (chondrocytes)– These cells are similar to bone cells, but the surrounding material is just loose and flexible compared to those of bone cells. Hence they are freely bendable. They are present in ear bone (therefore ears are fold-able), in between large bones to help them bend and move freely like in between two ribs, spinal bones, joints, etc.

3. Nerve cells: These cells form the nervous system.

Its features are like they are very long, having many branches at either end. They never multiply or divide in one’s lifetime. Once formed during fetus, they live until the entire life of an individual. They are present all over the body and are sometimes as long as few meters long.

These cells are found in plenty in the brain and the spinal cord. They combine to form the nervous tissue.

4. Epithelial cell:



These cells are very simple cells which form a covering of other cells.

They form covering layers of all the organs and hence are present in skin, scalp, respiratory tract, in the buccal cavity surface, over the surface of the heart, etc. Ex: Skin cells, mucous cells.

They also form the essential structures like the nephrons in the kidney which help infiltration of the blood.

5. Muscle cells: These cells are responsible for movements of our body. They are also called as myocytes and are present in the muscle tissues.

They are rich in proteins like actin and myosin due to which they contract. They are mostly long, large and can provide movements to the body. They are three types as the skeletal, cardiac and smooth muscle cells.

Skeletal muscles cells are attached to long bones and assist in their movements (by muscle contraction).

They are also called as striated cells as they have bands or striations on them as seen above (white and red bands). These bands are indicative of actin and myosin filaments which help in contraction.

Cardiac muscles cells are present only in heart muscle and responsible for heartbeats.



These are also striated but have branches with others.

Smooth muscle cells are flexible yet, can contract and relax and are present in stomach, intestine, blood vessel walls (vascular tissue), etc. helping in the movement of food through the gut.



Muscle cells also store glucose due to which they generate energy and heat required by the body.

6  Secretory cell: These cells as the name indicates are secretory in function. They form glands and secrete something important ex; pancreatic cells which secrete insulin, glucagon, salivary gland secrete salivary amylase, sebaceous gland secrete oil on the skin, etc.They are found in all secretory organs.

7. Adipose cells: These are fat cells and are sites where fat is stored. They are mainly seen in the soles, palms, bums, etc. They reduce friction to the body.

8. Blood cells:

These cells include RBC’s, WBC, Thrombocytes, etc. They are always motile and never stay in one place. They have a limited lifespan and they never multiply to form new cells. Instead, new cells are formed from other cells.

Answer 2

Answer:

Hi as there are total 200 cells, i can't do all but here are 5.

There are four types of glial cells in the central nervous system; astrocytes, oligodendrocytes,microglial cells, and ependymal cells. There are 3 types of muscle cells, known as myocytes, in the human body. These types are skeletal, cardiac and smooth muscle.