Explanation

White blood cells, also called leukocytes are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.

The lifespan of white blood cells ranges from 13 to 20 days

Explanation

there are different types of wind

1. when there is no wind we say it is calm.
2. a little wind is called a breeze.
3. A strong wind is called Gale
4. Hurricane is a very strong wind

Explanation

skeleton ڈھانچہ

Adult Human Skeleton Is Made Up of 206 Bones

Details of skeleton bones

Explanation

Kerosene, is a combustible hydrocarbon liquid which is derived from petroleum.

It is widely used as a fuel in aviation and households.

Explanation

In the membranous skeleton, the perineurium sheath surrounds the central nervous system. 

The perineurium is a protective layer of connective tissue that encases nerve fibers.

It providing support and shielding them from external damage.

Explanation

Answer:

C

  excess perspirations causes weakness,  because of the loss of more water from the body

Explanation

The respiratory system consists of air-filled tubes or tracheae, which open at the surface of the thorax and abdomen through paired spiracles. 

Explanation

The structure of the earth is divided into four major components: the crust, the mantle, the outer core, and the inner core. 

Explanation

The inner planets, or terrestrial planets, are the four planets closest to the Sun:ev

Explanation

The noun discovery means the finding or uncovering of something.