Cells & Tissue (Ch1 APP)

Question 1

How many cells are there in the human body?

Answer 1

Trillions

Question 2

How many cell types are there?

Answer 2

200 different cell types

Question 3

Bone cells

Answer 3

Form and regenerate the bones in the body - support bones

Question 4

Blood cells

Answer 4

Carry oxygen and help the immune system

Question 5

Nervous system cells

Answer 5

Send messages within the brain & throughout the body to produce actions.

Transmit signals

Question 6

Muscle cells

Answer 6

Move the body

Question 7

Skin cells

Answer 7

Protect organs

Question 8

Sex cells (male & female)

Answer 8

Unite to produce offspring - enable reproduction

Question 9

Somatic cells

Answer 9

Include all body cells except sex cells. They arise from the zygote formed by two sex cells during fertilization.

Question 10

What is the differentiation process?

Answer 10

As cells divide & multiply in the embryo, they change in shape and structure depending on which parts of their genetic code are activated.

Question 11

Gas exchange happens in the

Answer 11

Alveoli of the lungs