Cardiovascular and respiratory systems Flashcards
The cardiovascular system is composed of:
Heart, blood vessels, and blood
The function of the cardiovascular system
- deliver oxygen, fuel and nutrients to tissues
- removes carbon dioxide and waste products
- maintains constant body temp
- prevents infection
Your right heart pumps ____
deoxygenated blood to lungs (pulmonary circulation)
Your left heart pumps ____
oxygenated blood to your body (systemic circulation
Cardiac Cycle
- your heartbeat in two phases (diastole phase and Systole phase)
Parts of your Vascular system
- Arteries
-Capillaries
-Veins
what carries blood away from the heart
Arteries
What returns blood to the heart
veins
What is responsible for the exchange and nutrients with the tissues
capillaries
Frank-Starling Law
Ability of the heart to stretch and increase the forces pf contraction
Blood Pressure
The force exerted by blood against the walls of the arteries
Normal blood preassure
120mmHg over 80mmHg
Respiratory system is in two zones:
- Conductive Zone
- Respiratory Zone
Conductive Zone
structures that transport air to the lungs
- mouth, larynx, trachea ect.
Respiratory Zone
exchange of gases
- respiratory bronchioles
- Alveolar ducts
-Alveolar sacs
Mechanism of breathing
- Inspiration
- expiration
Inspiration
is the contraction of the diaphragm
Expiration
air is expelled and thoracic cavity is reduced
Ventilation
is the volume of air moved by the lungs in 1 minute
Respiratory control centers
- inspiratory centre(medulla oblongata)
-expiratory centre (Medulla oblongata) - Pneumotaxic and apneustic centres
Static lung volumes
determined by structure of the lung
- Tidal volume
- total Lung capacity
- Vital Capacity
- Residual volume
Dynamic lung volumes
dependent on volume as well as movement/flow of air
Diffusion mediates _____
Gas exchange
Diffusion Pathway is
An area in which gases move from the lungs into the blood; from the blood to the tissue and back
