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Double Circulatory System
The blood flows through the heart twice for each complete circuit of the body
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Single Circulatory System
The blood flows through the heart once for each complete circuit of the body
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Transport
The movement of substances suach as oxygen, nutrients, hormones, waste and heat around the body
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Arteries
Vessels that carry bloody away from the heart
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Arterioles
Small blood vessels that distribute blood from an artery to the capillaries
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Capillaries
Very small vessels with very thin walls
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Close Circulatory System
The blood is held in the vessels
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Open Cicrculatory System
The blood is not held in the vessels
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Veins
Vessels that carry blood to the heart
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Venules
Smallblood vessels that collect blood from capillaries and lead into the veins
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Blood
The fluid used to transport materials around the body
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Hydrostatic Pressure
The pressure that a fluid exerts when pushing agaisnt the sides of a vessel or container
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Lymph
The fluid held in the lymphatic system, which is a system of tubes that returns excess tissue fluid to the blood system
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Oncotic Pressure
The pressure created by the osmotic effect of the solutes
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Plasma
The fluid portion of the blood
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Tissue Fluid
The fluid surrounding the cells and tissues
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Atrio-Ventricular Valves
Valves between the atria and the ventricles, which ensures that blood flows in the correct direction
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Cardiac Muscle
Specialised muscle found in the walls of the heart chambers
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Semilunar Valves
Valves that prevent blood re-entering the heart from the arteries
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Cardiac Cycle
The sequence of events in one full beat of the heart
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Bradycardia
A slow heart rhythm
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Ectopic Heartbeat
An extra beat or an early beat of the ventricles
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Electrocardiogram
A trace that records the electrical activity of the heart
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Fibrillation
Uncoordinated contraction of the atria and ventricles
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Myogenic Muscle
Muscle that can initiate its own contraction
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Purkyne Tissue
Consists of specially adapted muscle fibres that conduct the wave of excitation from the AVN down the septum to the ventricles
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Sino-Atrial Node
The hearts pacemaker. It is a small patch of tissue that sends out waves of electrical excitation at regular intervals in order to initiate contractions
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Tachycardia
A rapid heart rhythm
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Affinity
A strong attraction
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Dissociation
Releasing the oxygen from the oxyhaemoglobin
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Fetal Haemoglobin
The type of haemoglobin usually found only in the fetus
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Haemoglobin
The red pigment used to transport oxygen in the blood
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Carbonic Anhydrase
The enzyme that catalyses the combination of carbon dioxide and water
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Chloride Shift
The movement of chloride ions into th erythocytes to balance the charge as hydrogencarbonate ions leave the cell
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Bohr Effect
The effect that extra carbon dioxide has on the haemoglobin, explaining the release of more oxygen
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Haemoglobin Acid
The compound formed by the buffering action of haemoglobin as it combines with excess hydrogen ions
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Other cards in this set

Card 2

Front

The blood flows through the heart once for each complete circuit of the body

Back

Single Circulatory System

Card 3

Front

The movement of substances suach as oxygen, nutrients, hormones, waste and heat around the body

Back

Preview of the back of card 3

Card 4

Front

Vessels that carry bloody away from the heart

Back

Preview of the back of card 4

Card 5

Front

Small blood vessels that distribute blood from an artery to the capillaries

Back

Preview of the back of card 5
View more cards

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