N5 Biology - Unit 2.6

Which of the following describes the structure of arteries?

• Thick, elasticated walls to withstand high blood pressure

• Contains valves to prevent the backflow of blood

• Thin, one cell thick walls to allow gas exchange

Which of the following describes the structure of veins?

• Thick, elasticated walls to withstand high pressure

• Contains valves to prevent the backflow of blood

• Thin, one cell thick walls to allow gas exchange

Which of the following describes the structure of capillaries?

• Thick, elasticated walls to withstand high blood pressure

• Contains valves to prevent the backflow of blood

• Thin, one cell thick walls to allow gas exchange

Blood is composed of four separate parts. Red blood cells, white blood cells, platelets, and ...

Blood is composed of four separate parts. Red blood cells, white blood cells, plasma, and ...

Red blood cells have no nucleas

• True

• False

A red blood cell contains a large amount of protein called...

Haemoglobin can bind to oxygen to produce...

What is the fuction of white blood cells?

• They contain pagocytes that engulf and digest pathogens

• The are small and flexable and can squeeze through the arteries

• They travel through the blood stream to interact with their target organ

• They release insulin into the blood stream

White blood cells contain ... to engulf and digest pathogens