B4- The Heart Flashcards
The composition (structure) of an artery muscular wall
Thick, muscular elastic wall, narrow lumen
Blood pressure of the artery?
Blood under high pressure
Does the artery have valves?
No valves
Direction of blood flow in the artery?
Carries blood away from the heart
Does the artery carry oxygenated or deoxygenated blood?
Blood has lots of oxygen (usually)
Composition (structure) of the vein wall?
Thin wall, large lumen
Blood pressure in the vein?
Blood not under pressure (low pressure)
Does the vein have valves?
Has valves
Direction of the blood flow in the veins
The blood flows up to the heart
Is the blood in the vein oxygenated or deoxygenated?
Blood has little oxygen, deoxygenated (usually)
Composition of the capillary wall
Very thin wall (permeable)
Blood pressure in the capillary?
Blood under low pressure
Does the capillary have valves?
No valves
The direction of blood flow in the capillary?
The capillaries connects the arteries to the veins
What organ pumps blood around the body?
The heart
How many chambers does the heart have?
4 chambers
The chambers are split into 2 ( have the same name) what are the names of the chambers?
The heart has 2 atria and 2 ventricles.
What is the atria?
The upper chambers of the heart which receive blood from the veins. (Singular-atrium)
What is the ventricle?
The lower chamber of the heart that receives blood from the atrium (atria) and pumps it into the arteries.
the pulmonary circulation
The part of the circulatory system that involves the right side of the heart, the lungs and the blood vessels that connect them together.
The systemic circulation
The part of the circulatory that includes the left side of the heart, the rest of the body apart from the lungs, and the blood vessels that connect them together.
The pulmonary circulation system and the systemic circulation system are apart of…?
The double circulation
The pulmonary circulation transports..?
Blood to the lungs
The systemic circulation transports…?
oxygen and nutrients to the body
carbon dioxide and other wastes away from cells
Describe how the heartbeat is controlled (2)
The heartbeat is controlled by cells in the right atrium (1) that acts as a pacemaker (1)
(Total 2 marks)
How can atrial fibrillation be treated? (2)
An artificial pacemaker could be fitted (1 mark) this produces an electric current to keep the heart beating regularly
