Human Diseases! 🔗
- No end of topic test
- This unit will be assessed in the End of Year Exam only
- Glue in your learning outcomes sheet
| Akoranga 1 () | Akoranga 2 () | Akoranga 3 () | Akoranga 4 () | |
|---|---|---|---|---|
| T1 W1 | 1. Parts of the Heart & Blood Flow | 2. MI Risk, Causes, Symptoms & Treatments | ||
| T1 W2 | 3. | 4. Heart Dissection | 5. Blood | 6. Review/Catch-Up |
| T1 W3 | 7. Blood Vessels | 8. Respiration & Lungs | 9. Lungs 2 | 10. Lung Practical |
| T1 W4 | 11. Effects of Exercise | 12. Inheritable Diseases | 13. Genes & Alleles | 14. |
| T1 W5 | 15. EOY Exam This Week | 16. EOY Exam This Week | 17. EOY Exam This Week | 198 EOY Exam This Week |
Circulation 🔗
- The human body is made up of two circulatory loops
- Pulmonary (of the Lungs) Circulation
- Brings oxygenated blood from the lungs to the heart and takes deoxygenated blood from the heart to the lungs
- Systemic (of the body) Circulation
- Takes oxygenated blood to the body and returns deoxygenated blood to the heart from the body
- These loops are parallel - they work independently of each other.
Ngohe/Task: Parts of the Heart 🔗
- Collect a diagram of the heart & glue it in
- Use the slides on Classroom to make notes about the different parts of the heart
Left Atrium 🔗
Receives oxygenated blood from the lungs (pulmonary circulation)
Left Ventricle 🔗
Pumps oxygenated blood out to body via the aortic valve (systemic circulation). Has a thick muscle wall to help pump the blood a long distance at a high pressure!
Right Atrium 🔗
Receives deoxygenated blood from the body (systemic circulation).
Right Ventricle 🔗
Pumps deoxygenated blood to the lungs via the pulmonary valve (pulmonary circulation).
What about all the tubes? 🔗
- The Superior (top) and Inferior (bottom) Vena Cava carry deoxygenated blood to the heart from the body (systemic circulation).
- The Pulmonary Artery carries deoxygenated blood to the lungs - that’s why it splits in two!
- The Pulmonary Veins carry oxygenated blood from the lungs - there is two per side!
- The Aorta carries lots of high pressure oxygenated blood to the body - that’s why it’s huge!
What about the valves? 🔗
- Valves exist to stop blood flowing back the wrong way!
- This is important because you don’t want deoxygenated blood flowing backwards, when you body needs oxygenated blood going forwards!
Arteries vs Veins 🔗
- Arteries carry blood away from the heart (a for arteries, a for away)
- Veins carry blood towards the heart
Ngohe/Task: Flow Direction 🔗
Starting with deoxygenated blood returning to the heart through the superior and inferior vena cava, make a numbered list describing where it goes after that. You will need to use your notes to figure it out!
🔗
- Deoxygenated blood from the body enters the right atrium of the heart via the superior and inferior vena cava.
- The right side of the heat compresses, pushing the blood into the right ventricle.
- Deoxygenated blood leaves the heart and travels to the lungs via the pulmonary arteries.
- The lungs oxygenate the blood.
- Oxygenated blood from the lungs travels to the left atrium of the heart via the pulmonary veins (two per lung).
- The left hand side of the heart compresses, pushing the blood into the left ventricle.
- Oxygenated blood leaves the left ventricle via the aorta (and artery) to the body.
