Functions, Blood Vessels, Beating Heart Flashcards
What are the three main types of blood vessels?
Arteries, Veins, Capillaries
What is the function of the pulmonary pathway?
Transports oxygen-poor blood to the lungs and returns oxygen-rich blood through the pulmonary veins
What does the systemic pathway do?
Moves oxygen-rich blood from the left ventricle of the heart to the body tissues
What is the purpose of the coronary pathway?
Provides blood to the heart
What are the three major components of the circulatory system?
- Heart
- Blood vessels
- Blood
What is the main function of the circulatory system?
Transport gases, nutrients, and waste materials; regulate temperature; protect against blood loss and disease
What do arteries carry?
Oxygen-rich blood away from the heart
Describe the walls of arteries.
Highly elastic to allow expansion and contraction
What do veins carry?
Oxygen-poor blood toward the heart
How do veins differ from arteries?
- Thinner walls
- Larger inner circumference
- Not elastic
- Have one-way valves
What is the role of the Atrioventricular (AV) Node?
Transmits electrical signals through the bundle of His to initiate contraction of ventricles
What is the function of the Sinoatrial (SA) Node?
Generates electrical signals to stimulate rhythmic contraction of the atria
What are capillaries?
Smallest blood vessels where gas and nutrient exchange occurs
What is the structure of capillary walls?
Single layer of cells with tiny diameter for blood cells to pass through single file
Fill in the blank: The cardiovascular system consists of the _______ and blood vessels.
[heart]
True or False: The circulatory system is responsible for protecting against disease-causing microbes.
True
What is the ‘Heartbeat’?
An electrical signal coming from the heart
What is the mnemonic to remember that arteries carry blood away from the heart?
Arteries Away
