organisation in animals b4

What are the 5 levels of organisation in living organisms

• cell

• tissues

• organs

• organ systems

• organisms

What is a tissue?

A group of cells with similar structures and functions

What is an organ?

A group of tissues working together to perform a specific function

What is the function of bile in digestion?

Neutralise hydrochloric acid from the stomach and emulsify fat to form small droplets with a large surface area

What is the function of saliva in digestion

Lubricstion to help swallowing - contains amylase to break down starch

Name three enzymes produced in the pancreas

• amylase

• protease

• lipase

Name the four main components in blood

• red blood cells

• White blood cells

• Plasma

• Platelets

What is the function of platelets?

Form blood clots - prevent the loss of blood and stop wounds becoming infected

How does air pass through the human body

• mouth/nose

• Trachea

• Bronchi

• Bronchioles

• Alveoli

What is the function of arteries?

Carries blood away from the heart under high pressure

What’s the function of veins?

Carries blood to the heart under low pressure

What’s a way to remember where the ventricle and arteries are

• A points up so its at the top

• V points down so its at the bottom