Show:
Blood
Blood vessels
Circuits of the body
The heart
100

Name 4 components of blood

white blood cells, red blood cells, platelets and plasma

100
Does arteries or veins have valves?

veins

100

Do humans have an open or closed circulatory system?

closed

100

How many chambers does the heart have?

4

200

Give 3 functions of blood

  • Transport nutrients :Food and other dissolved substances

  • Transport heat :By plasma to maintain body temperature

  • Transport oxygen

  • Fight infection

200

Name 3 characteristics of arteries 

  • Thick walls 

  • Narrow Lumen

  • High pressure - blood flows in pulses

  • No valves

  • Has oxygenated blood

200

What is a closed circuit?

  • Blood never leaves vessels

  • Body cells are met by small vessels called capillaries

  • Allows for changes in blood supply to organs

200

Name the 4 major blood vessels that carry blood to & from the heart

Vena Cava, Pulmonary artery, Pulmonary vein and Aorta

300

Give the alternative name, function & benefits of platelets

Thrombocytes

Function: Clots blood to seal wounds

Benefits: Prevents entry of pathogens & reduces blood loss

300

Name 3 characteristics of veins

  • Large lumen

  • Thin walls

  • Have valves

  • Pressure is low

  • Deoxygenated blood

300

Describe the pulmonary system/ circuit

  • Blood starts in heart

  • Blood pumped to lungs

  • Blood is oxygenated -oxygen content of blood increases

  • Blood returns to heart

  • Purpose:Exchange gases in the lungs
    Carbon Dioxide is swapped for Oxygen

300

What is the function of the septum?

  • Used to separate left and right atria and ventricles

  • Purpose is to prevent mixing of oxygenated and deoxygenated blood

400

I have A+ blood I can receive blood from…

O-,O+, A-,A+

400

Give 3 chaarcteristics of capillaries 

  • Single cell thick walls

  • Permeable

  • Allow exchanged of materials

  • Act as a junction between arteries, veins and body cells

400

Describe the system circuit/ system

  • Blood starts in the heart

  • Blood is pumped to body cells

  • Blood carries supplies to body cells

  • Blood returns to the heart

  • Purpose:Transport of nutrients to and from body cells

400

Give the locations and functions of the SA & AV nodes

  • Sinoatrial Node (SA Node) :Found at the top of the right atrium, Impulses start here. Causes atria to contract

  • Atrioventricular Node (AV Node) :Found in the septum at the base of the right atrium.
    Stimulated by the SA Node.
    Causes ventricles to contract.

500

Explain a blood disorder & the impact it has on the person

  • Haemophilia: Explanation :Affected people cannot produce clotting factors (platelets)

  • Impact :Affected people cannot clot wounds and suffer from excessive bleeding.

  • Anaemia: Explanation: Lack of haemoglobin or red blood cells.Lowers oxygen content in blood

    • Impact: Affected people can be pale and have low energy

500

Describe the importance of pressure in blood vessels

High pressure: Forces elastic tissue to expand and contract rapidly & Allows blood to flow efficiently to the different areas of the body.

Low pressure: Reduces speed of blood flow

500

Describe the portal system

Systems that start and end with capillaries.

  • Hepatic Portal Vein - Connects the Stomach and intestines to the Liver

500

Describe how blood flows through the heart.

Event 1: Blood enters the heart

Event 2: Blood pumped to ventricles

Event 3: Atria relax (Diastole),Ventricles contract (Systole), Blood pumped out of the pulmonary artery and Aorta, Semi-Lunar valves open, Bicuspid and Tricuspid valves closed, Ventricles relax (diastole), Semi-Lunar valves close preventing backflow of blood, Vena Cava and Pulmonary vein open again