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what is biology? the study of living things
what are the cells theories? 1. All living things are made up of one or more cells 2. Cells are the basic building blocks of all living things, making up their structure and allowing them to function 3. New cells are produced from existing cells.
what does unicellular mean? Unicellular organisms are made up of only one cell.
What does multicellular mean? Multicellular organisms are made up of many cells.
how do you calculate magnification? you need to multiply the magnification of each lens.
name 4 specialised animal cells Some specialised animal cells include: Muscle cells Nerve cells Blood cells Fat cells
sort the things from smallest to largest groups. cells, tissue, organs, organ system, organism
name 4 types of tissues connective, muscle, nervous, epithelial
what is epithelial tissue? your skin
what is connective tissue? Adds support and structure to the body. eg. fat, bone, cartlidge, ligament and tendon.
what is the nervous tissue? Sends electrical signals around the body. Thousands of nerve cells are grouped together to form your nerves.
what is muscle tissue? Moves the bones in your body by contracting and expanding.
what is the the circulatory system? our circulatory system consists of your heart, blood vessels and blood. Its function is to circulate blood around the body. The blood carries all the materials needed by the body through the blood vessels.
name 3 types of blood vessels? Arteries Capillaries Veins
what is the Arteries Arteries carry blood away from the heart.
what are veins? Veins carry blood into the heart.
what is the heart? he heart is made of cardiac muscle and does not get tired even though it pumps about 100, 000 times a day.
how does the heart start? when the heart muscles relax and blood flows into the atria
step 2 the atria contracts and the valves open to allow blood into the ventricles
step 3 the valves close to stop the blood from flowing backwards.
what is the digestive system? The digestive system breaks down (digests) food into simple, soluble chemicals that can be used by your cells in cellular respiration.
what is Mechanical digestion? when food is physically broken down into smaller pieces. eg mouth crushing food
what is chemical digestion? when large complex substances are broken down into simpler chemicals. by your stomach acids
what is the purpose of the stomach? Main focus is the digestion is breaking down of proteins.
whats the purpose of the small intestine? When the food enters the small intestine is is in the form of very tiny particles that can be absorbed by the body.
whats the purpose of the large intestine? Water is reabsorbed into the body in the large intestine with any remaining nutrients.
what is the the respiratory system? Your respiratory system takes in air and extracts oxygen from it. It allows oxygen to pass into your bloodstream to be distributed to the cells for cellular respiration.
what happens when we breath in? rib muscles contract diaphragm contracts volume of the chest cavity increases air rushes into the lungs
what happens when we breath out? rib muscles relax diaphragm relaxes chest cavity volume increases air is forced out of the lungs
Created by: niadritsas