Human body systems

Question 1

what are the 4 levels of organisation in the human body?

Answer 1

1) cells - the smallest unit of life
2) tissues - groups of similar cells that perform a specific function (muscle tissues)
3) organs - groups of tissues that perform a function ( such as stomach)
4) body systems - groups of organs working together to perform a function ( digestion)

Question 2

what are the 9 systems the human body includes?

Answer 2

1) circulatory system
2) respiratory system
3) digestive system
4) nervous
5) immune system
6) endocrine system
7) reproductive system
8) urinary system
9) skeletal system,

Question 3

what is an artery?

Answer 3

blood vessels that deliver oxygen

Question 4

what is capillaries?

Answer 4

very tiny blood vessels

Question 5

what is a trachea

Answer 5

windpipe

Question 6

what is bronchi

Answer 6

the large air passage that lead from the trachea to the lungs

Question 7

what is alveolus?

Answer 7

tiny spherical sac