Last Quiz! Flashcards
Respiration
Gas Exchange (O2 to tissues, removal of CO2 from the system)
Circulation
Transport of nutrients, gases, hormones, blood, etc. through the body
Small aquatic organisms achieve gas exchange through
diffusion
ex: sponges, Cnidarians, Flatworms
Lungs must be kept _____ for gas exchange
moist
Upper Respiratory Tract
Naval Cavity
Pharynx
Larynx
Lower Respiratory Tract
Trachea
Primary bronchi
Lungs
Air Flow
Nostril Pharynx Larynx Trachea Bronchi Lung Bronchioles Alveoli
Alveoli
Sacs
One cell thick
Covered by capillaries
Where gas exchange occurs
Three parts to the circulatory system
Circulatory fluid
Interconnecting tubes
Pump (heart)
Open System
The circulatory fluid directly bathes the organs
Closed System
Confined to vessels
Red Blood Cells
Erythocytes
Transport O2 and CO2
No nucleus in human RBC
White Blood Cells
leukocytes
Primary protect the body from infection
Have a nucleus
Platelets
Aid in blood clotting
Form scabs
Arteries
Thicker walled
Mostly oxygenated blood
Branch into smaller and smaller arterioles
Veins
Thinner Walled
Mostly deoxygenated blood
Have one-way valves
Capillaries
Smallest and thinnest
Allows for the diffusion of oxygen and carbon dioxide
Fish Circulation
Atrium - collects blood from the body
Ventricle- blood from the atrium
Blood Movement- Gills, Body, Back to heart
Problems- Drop in blood pressure to movement through 2 capillary beds