2a Level of organisation

Question 1

How is the body organised?

Answer 1

Organelle
Cell
Tissue
Organ
System
Organism

Nucleus
Muscle cell
Muscle
Heart
Circulatory system
Human

Question 2

How do cells come together to make a whole living organism?

Answer 2

Cells are the building blocks of life, some examples include root hair cells and nerve cells.
Cells of similar structure and function can group together to form tissues.
A group of tissues that work together to carry out a particular function is called an organ.
An organ system is a collection of organs that work together to carry out a particular function. The different organs within a system are linked together by vessels or tubes

Question 3

What is the digestive system?

Answer 3

Includes the oesophagus, stomach and intestines. allows breakdown of food

Question 4

What is the respiratory system?

Answer 4

Includes the lungs, which exchange oxygen and carbon dioxide

Question 5

What is the circulatory system

Answer 5

Includes the heart and blood vessels, which transport materials around the body

Question 6

What is the excretory system?

Answer 6

Includes the kidneys, which filter toxic waste materials from the blood

Question 7

What is the nervous system?

Answer 7

Consists of the brain, spinal cord and nerves, which coordinate the body’s actions

Question 8

What is the endocrine system?

Answer 8

Includes glands which secrete hormones, which act as chemical messengers

Question 9

What is the reproductive system?

Answer 9

Produces sperm in moles and eggs in females, and allows for the development of the embryo