Immune System

"The Human body is not like a house which can be made of a single kid of building block" 

Our body is made of many different kinds of cells because they must do many different things to keep you alive. There are nerve cells which carry message to move from your brain cells which destroy harmful bacteria and others which make your muscle move.

There are many other cells with each a special job on their own and are suited for their shape, size  and internal structures. When all cells of body cooperate by doing their job, the body is in good health, 

Leukocytes

They help body fight infection and other diseases. Types of leukocytes are granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes (T cells and B cells).

Involuntary Muscles 

Involuntary Muscles are muscles that don't move or contract under the conscious control of a person, i.e., these muscles work automatically.

Located muscles like organs urinary bladder, blood vessels, stomach, intestine, etc. As well for cardiac muscles, which are in the heart.

Voluntary Muscles 

Voluntary Muscles are muscles that move/contract under conscious control of someone. like the name suggests because they act like we wish them to. 

Actions like jumping, running are caused by their contraction. 

of the cells. Located in skeletal system attached to bones with help of tendons. 

They are long spotted, ribbon like shapes and are usually found in legs and arms. The cells are so long that we can't see the end within the field of the side. 

Differeces between Voluntary and Involuntary Muscles

• Voluntary muscles get fatigued and rest. 

• Involuntary muscles don't, they don't experience fatigue and work without stopping.

• Voluntary muscles are essential for all body movement and its locomotion.

• Involuntary muscles are essential for functioning internal organs and basic functions of life, e.g., heartbeat, elimination of waste products from body.

• Voluntary muscles need high energy requirement

• Voluntary muscles has relatively low energy requirement aside from cardiac involuntary.

White Blood Cell (WBC)

Wikipedia

WBC are larger than red cells and have nuclei. All WBC keep our blood clean eating bacteria and other foreign particles.

In a blood drop there are around 5 m RBC and 7,500 WBC.

Its cell membrane is composed of proteins and lipids, and this structure provides properties essential for physiological cell function such as deformability and stability of the blood cell while traversing for circulatory system and specifically the capillary network.

Lymp Gland Cell

Cells in Lymp Gland which are located in many parts of body, like tonsils and underarms.

 They're similar to WBC because of having similar jobs. They destroys bacteria in lymph glands, just as WBC destroy bacteria in blood. 

Aroud the duct are many gland cells. 

B is the nucleus of one of these cells. These cells produce a substance which bursts from cells and enters duct. This substance flows into the intestines where it mixes with food to help our digestion.z

Cheek Cells

These cells are thin and flat, which makes the cheek smooth, flexible and strong. They fit together like tiles on a floor except that they overlap slightly there are several layers of these cells in the lining of cheek. When chewing foods the top layer of cheek cells are worn away. Those beneath them are pushed up to take their place. The large spot in center of each cell is nucleus.