(1.4)Human Systems- Circulatory System

(p60-61)

Recall – 11 Human Systems

The Circulatory System• The respiratory system

carries oxygen to and removes carbon dioxide from the blood.

• The system that transports these gases between the lungs and the cells is the circulatory system.

The Heart – Figure 1.21 (p60)• The heart is the muscular

organ that drives the circulatory system.

• It pumps blood to the cells and then back to the heart.

• The arrows and numbers on the diagram to the left show the path that the blood takes.

• Please label your heart diagram now.

The Circulatory System

body

Right atrium

Right ventricle

lungs

Left atrium

Left ventricle

aorta

Blood flow through the body

Blood Vessels

• There are many different blood vessels in the human body.

• The main blood vessels are arteries and veins.• Capillaries allow gas exchange to occur.

Blood Vessels

• Arteries are thick-walled, elastic blood vessels that carry oxygen-rich blood away from the heart.

• Veins are thin-walled, inelastic blood vessels. They have valves that keep blood carrying carbon dioxide from backing up as it is carried toward the heart.

Some Videos

https://www.youtube.com/watch?v=BEWjOCVEN7M

https://www.pinterest.com/pin/279434351854921038/

CLASS WORK

• Page 61 LC # 1 – 3• BLM 1-29