Circulation Flashcards
(120 cards)
Circulation is so important in higher organisms that if the heart stops beating ____ will occur
Death
Multicellular organisms rely on ____ _____ to bring nutrients to and take wastes away from
Circulatory system
Circulatory system consists of the ___ and ______
Heart and blood vessels
The heart is a four chambered organ that is made up of mostly ____ that allows it too contract and relax, pumping blood to our blood vessels
Muscles ( cardiac)
The _____ ______ are used to transport the blood from the heart to the tissues and then back to the heart
Blood vessels
_____ _______ carry blood from the heart to the tissues ( arteries and arterioles) and then back to the heart ( veins and venules)
Blood vessels
_____ connect the arterioles to venules, and exchange material with the tissues
Capillaries
Arteries carry blood _____ from the heart
Away
Veins carry blood _____ the heart
Towards
Most arteries contain ____ blood
Oxygenated
Most veins carry ____ blood
Deoxygenated
What are the two exceptions?
Pulmonary and umbilical arteries- deoxygenated blood away
Pulmonary and umbilical veins - oxygenated blood towards the heart
What are the three types of blood vessels?
Arteries/ arterioles
Veins/ venules
Capillaries
Arteries carry blood ____ the heart
Away
Arteries are thick walled they have ___ layers
3
Arteries layers are made of ___ ___ elastic figures and supporting tissue
Smooth muscle
Middle layer is composed of ____ and gives the arteries ____ and allows them to _____ and dialate
Muscle
Contract
The elastic fibres in arteries allow them to ____ and _____ or pulse
Stretch
Contract
Relating to arteries connects to arteries/arterioles which lead to capillaries
Arterial
Hardening of the arteries
Arteriosclerosis/ atherosclerosis
Related to do with atrium and ventricle
Atrioventricular
One of two blood collection chambers in the heart
Atrium/atria
A collection of blood vessels -to fill tissue or organ
Capillary bed
A complete heartbeat
Cardiac cycle