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KS3 Biology vocab.

Common Entrance (KS3) Biology vocabulary

ADAPTIONS Special features that help animals and plants fit into their environment.
ALGAE A group of plants that have no proper roots, stems or leaves.
ALVEOLI The tiny air sacs in lungs where gaseous exchange takes place.
AMNION A water filled sac (containing AMNIOTIC FLUID) that helps support and protect the developing embryo.
AMPHIBIANS A group of animals where the adults have lungs and breath air. The young have gills and live in water. eg frog or toad
ANNELIDS Segmented worms with bristles on each segment e.g. earthworm or leech.
ANTAGONISTIC MUSCLES Muscles that work in pairs. An example are the biceps and triceps in the arm.
ANTHER The top part of the stamen, the male part of a flower. Where pollen is made.
ARACHNIDS Animals that have 4 pairs of legs, 2 parts to the body eg spider, scorpion.
ARTERIES Blood vessels that carry blood AWAY FROM the heart.
ARTHROPODS Animals that have many pairs of jointed legs and an exoskeleton. They are divided into several smaller groups eg insects, arachnids and crustaceans.
ASEXUAL REPRODUCTION A form of reproduction where NO fertilization required. Examples: producing spores in fungi.
BLADDER The organ in a human that stores urine.
BRAIN An organ that controls and coordinates all the major functions of the body. Where all the nerves meet.
CAPILLARIES Tiny blood vessels that carry blood to the individual cells and to the surface of the skin.They link the arteries to the veins.
CARBOHYDRATE A food group that supplies us with energy. Carbohydrates contain starch or sugar. Examples include sweets, bread, pasta
CARBON DIOXIDE A colourless gas used by plants during photosynthesis and breathed out by humans as a waste product.
CARNIVORE (carnivorous) A consumer that eats other animals. eg ladybird, fox, pike.
CELL (biology) The basic unit of all life. All contain a nucleus, cytoplasm and a cell membrane.
CELL MEMBRANE The living covering to a cell. It controls what passes in or out of the cell.
CELL WALL The dead, outer edge to a plant cell. gives the cell strength. Made of cellulose.
CHLOROPLASTS The part of a plant cell which carries out photosynthesis. Contain chlorophyll.
COLD-BLOODED An animal whose body temperature changes with the temperature of the surroundings .
CYTOPLASM . The living contents of a cell (excluding the nucleus). Found in ALL cells.
DIGESTION The process where food is broken down by enzymes into simple chemicals that are then absorbed into the body.
EAR An organ used for HEARING. Rapid changes in air pressure cause the eardrum to vibrate.
ECOLOGY The study of animals and plants in their natural environment and how they interact or depend on each other
ENZYMES Chemicals in the body that help break down food and allow digestion to take place.
EXOSKELETON The hard outside skin found on some animals such as crab, lobster and all insects.
EYE An organ used for seeing. Contains a LENS which focuses light onto light-sensitive cells found in the RETINA.
FALLOPIAN TUBE A tube in the female that carries the egg from an ovary to the uterus.
FERMENTATION The process where YEAST converts sugar into ALCOHOL and CARBON DIOXIDE.
FERTILIZATION (Human) The joining of the male and female gamete to form a zygote.
FISH A group of animals that have gills and live in water.
FLOWER The part of a plant that contains the reproductive organs. Where the plant makes seeds.
FUNGI A group of organisms similar to plants but do not possess green chlorophyll so cannot carry out photosynthesis.
GAMETE The name given to the special cells that join during sexual reproduction (eg egg and sperm)
GERMINATION When a seed shows first signs of growth. In order to germinate seed needs WATER, OXYGEN and WARMTH.
HABITAT The place where an animal or plant makes its home.
HEART The organ used to pump blood to and from the lungs and around the body.
HERBIVORE Describes an animal that eats only plants. (leaves, seeds, berries, bark etc) eg snail, mouse
HOST The organism on which a parasite is living
INSECTS Animals that have 3 pairs of legs, 3 parts to the body and usually 2 pairs of wings eg butterfly, ant.
INVERTEBRATES Animals without a backbone. examples are fly, slug, spider.
KIDNEY An organ in the body that removes waste (urea) from the blood.
LUNGS Organs that put oxygen into the blood and remove carbon dioxide
MAMMALS A group of animals where the young are born alive and have hair or fur on their bodies.
MITOCHONDRIA The part of a cell which carries out respiration. They provide the cell with energy.
OMNIVORE (omniverous) The word used to describe animals that eat plants and other animals.
PARASITE An animal or plant that lives on (or inside) the body of another living organism .
PHOTOSYNTHESIS The process by which plants manufacture glucose using carbon dioxide from the air and water from the soil using energy from the Sun.
PLACENTA An organ that supplies the developing embryo with food and oxygen from the mother's blood.
QUADRAT A square frame of wood (or area of land), often 1m x 1m, used during ecology to estimate populations.
REPTILES This group of animals that lays soft shelled eggs on land and their bodies are covered in hard scales.
RESPIRATION The process by which all living organisms release energy from sugar.
ROOT Part of a plant that absorbs water and dissolved mineral salts from the ground.
SCAVENGER The type of animal that lives from the remains of other animals. eg shrimp, vulture.
SMALL INTESTINE The organ where digestion and absorption of food takes place in mammals.
STAMEN The male part of a flower. Where the pollen is made. Is made up from a FILAMENT and ANTHER.
STIGMA This is the part of a flower where pollen lands during pollination. It is at the top of the carpel, the female part of the flower
TESTIS Where sperm are manufactured in a human.
TRACHEA Another name for the windpipe
UMBILICAL CORD A tube that connects the baby to the mother (before it is born). It consists of an artery and vein that connects the embryo's blood circulatory system to the placenta.
URETER The tube that carries urine from the kidney to the bladder
VEINS Blood vessels that carry blood TOWARDS the heart
VERTEBRATES This word describes animals that have a backbone.
WARM-BLOODED This word describes animals whose body temperature is constant
XYLEM VESSELS Vessels that transport water to the leaf of a plant from its roots.
YEAST fermentation) A single celled FUNGUS used in baking to make bread rise and in brewing to make alcohol.
ZYGOTE The cell formed by the fertilization of a male and female gamete.
CHLOROPHYLL The name of the green chemical needed by plants for photosynthesis to take place
POLLINATION The process whereby pollen reaches the stigma of a plant
PRODUCER Organisms at the beginning of a food chain that produce their own food. All plants are producers
SAPROPHYTE An organism that feeds or grows on decaying plants or animals.
SPERM A cell that contains the male gamete in animals. In humans sperm are made in the testis.
CONSUMER An animal that eats plants or another animal
PRODUCER An organism that makes food. Usually a green plant.
STARCH TEST Add iodine solution which turns a blue-black colour.
OVUM A cell that contains the female gamete in animals. In humans ova (eggs) are made in the ovary.
Created by: MikeCurtis



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