Class notes

Respiratory System Overview and Cardiovascular System Recap

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Course
Domestic Animal Science (ANTY2011)

Institution
Durham College ( )

A recap of the cardiovascular system and a detailed information sheet on the respiratory system complete with terminology, mechanics, and diagrams.

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Uploaded on June 30, 2022
Number of pages 2
Written in 2018/2019
Type Class notes
Professor(s) Mandy walters
Contains Cardiovascular system review and the respiratory system

cardiovascular system
respiratory system
blood
lungs
oxygen
animal care
domestic
animal
science
medicine
veterinary
anatomy
medical

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Respiratory System

Cardiovascular Review
1. Arteries- Carry oxygenated blood
2. Aorta- Receives blood from the left ventricle
3. Vena Cava- Returns blood to the right atrium
4. Capillaries- Where exchange of O2, CO2, ions and wastes take place
5. Mitral Valve- Controls blood flow between the left atrium and left ventricle
6. Pulmonary Artery- Carries deoxygenated blood from heart to lungs

Order of blood flow (not all features mentioned)
1. Right ventricle
2. Pulmonary Artery
3. Left Atrium
4. Mitral Valve
5. Aortic Valve
_____________________________________________________________________________________
Respiratory System

Functions
 Primary Function
o Respiration
 External
 Where gas exchange takes place between air in our lungs and our blood
 Internal
 Gas exchange between blood and cells in the body
 Cellular respiration
o Glucose + O2 ->> Energy ->> CO2 + Water
 Secondary Function
o Vocalization
 Air passes over larynx, vibrating vocal chords and forming sounds
o Temperature Regulation
 i.e. Panting to expel heat or fewer inhalations to conserve heat
o Acid-base regulation
 Chemical control system monitors O2 and CO2 levels in blood (pH) & adjusts
respiratory rate to help compensate
 If there is too much CO2, blood becomes too acidic- solution is to breathe more
and bring in more O2 to balance the pH levels (body likes balance)

Breathing Mechanics
1. Diaphragm contracts caudally, creating space in thoracic cavity, creating lower pressure, and
allowing air into lungs
2. Gas exchange- High to low diffusion
3. Diaphragm relaxes cranially, reducing space in thoracic cavity, creating higher pressure, and
pushing air out of lungs
4. Repeat

Respiratory centre of the brain controls the diaphragm and sets baseline for rate and depth of
respiration.

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