Organisation Flashcards
Which side of the heart is oxygenated?
Left side, and stronger
The right side of the heart is de-oxygenated, true or false?
True
Where are pacemaker cells found?
In the right atrium
What do pacemakers do?
Control your natural resting heart beat by producing and electrical impulse to contract muscle cells
Name 3 places in the heart?
Vena cava, right atrium, pulmonary veins
Describe the journey of the blood in the heart
The blood enters the vena cava after being used in the cells. It falls into the right atrium and then drains into the right ventricle. The blood builds up with lots of pressure and is contracted out of the right ventricle, then passes through the pulmonary artery and heads straight for the lungs.
Describe the journey of the blood after being used in the lungs
Enters through the pulmonary vein and into the left atrium before draining into the left ventricle, the muscle is thick because it needs to pump the blood around the whole body. The muscle contracts and send blood to vital organs
Which has a thicker layer of muscle.. artery or veins?
Artery
Does the vein have high or low pressure?
Low
True or false? Veins have valves
True
What blood do veins carry?
De-oxygenated
Why do veins have valves?
To prevent back flow
Why do arteries have a smaller lumen then the vein?
Because it has a thicker muscle wall
How to go from ml to l?
X1000
How to calculate blood flow rate?
Volume of blood divided by number of seconds
Name an adaptation of the blood
Large surface area, which creates more space of diffusion
Thin wall, creates a shirt diffusion pathway
Platelets, clots blood when u bleed
Plasma, turns blood to liquid
Name 3 places in the breathing system
Nasal cavity,bronchii,trachea
Describe inhalation
Your ribs expand because intercostal muscles contract and your diaphragm flattens, the volume increases and blood pressure is low
Describe exhalation
Your ribs go in in your diaphragm relaxes, the volume decreases and your blood pressure is high
Why do plants and animals respire?
To transfer energy
Where is respirtation?
In the mitochondria
Name 3 places in the human digestive system?
Pancreas,stomach,small intestine
What is dijestion?
Break down of large insoluble molecules into smaller solvable molecules that can be absorbed by the blood
Job of the oesophagus
Takes food to stomach by peristalsis
