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Biology - Coggle Diagram
Biology
Cells
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Unicellular Organisms
A unicellular organism is a single-celled organism, the cell moves with a little motor, and it carries out the same functions as a multicellular organism such as having to find food, create energy, and many others
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Body Systems
State examples of tissues, organs and organ systems
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Respiratory System
Lungs allow oxygen from inhaled air to pass across the very thin membranes in the depths of the lungs and enter the bloodstream
We need to get oxygen into the blood from the air, and we need to remove waste carbon dioxide from the blood into the air. Moving gases like this is called gas exchange. The alveoli are adapted to make gas exchange in the lungs happen easily and efficiently. Alveoli allow this because they give the lungs a really big surface area, have moist thin walls (just one cell thick) and they have a lot of tiny blood vessels called capillaries
If you do a lot of exercise, your cells need a lot of energy and therefore a lot of oxygen and glucose. Your heart beats faster to speed up the supply of oxygen and glucose to your cells. However during intense exercise your heat cannot supply your cells quickly enough to release all the energy they need
During intense exercise, your cells start to do a different type of respiration, anaerobic respiration (respiration without oxygen). Anaerobic respiration releases less energy and make a chemical called lactic acid. This can cause cramp. It is not just during exercise that your cells do not get enough oxygen, illness and high altitude can also reduce the oxygen supply to your cells
When you do exercise or you have asthma you often breathe through your mouth which forces you to breathe in colder and dryer air which make your trachea tighten up
The Skeletal System
The skeleton protects important internal organs. The skull protects the brain and the pelvis protects the reproductive organs
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The skeleton helps our bodies to move by a system of joints and by providing a base for muscles to attach to
Our skeleton is made of more than 200 bones. Calcium and other minerals make the bone strong but slightly flexible. Bone is a living tissue with a blood supply. It is constantly being dissolved and formed, and it can repair itself if a bone is broken.
Blood
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Blood Plasma is a straw-coloured liquid that transports hormones, antibodies, nutrients and waste substances around the body
