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Biology > Year 7 Work > Flashcards

Year 7 Work Flashcards

1
Q

What is an organ system

A

A group of organs working together e.g circulatory system

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2
Q

What is a sperm duct

A

Connects to the urethra and carries sperm away from the testes

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3
Q

Female reproductive system

A

Produces egg cells (ova) place where the baby develops produces female sex hormones
Uses ovaries, uterus, vagina

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4
Q

What is a vagina

A

A muscular tube that opens to the outside of the body

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5
Q

Digestive system

A

Digests and absorbs food. Digested food is absorbed into blood stream.
Uses oesophagus, stomach, liver, intestines, pancreas

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6
Q

Respiratory system

A

To allow oxygen to enter the blood and carbon dioxide I’d leave forces air into and out of the lungs
Uses lung trachea nose

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7
Q

What is fertilisation

A

The nucleus of the egg and sperm fuse together to form a zygote

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8
Q

What is a large vacuole

A

Contains a weak solution of salts and sugars called sap when fibula, helps to support the cell

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9
Q

What are chloroplasts

A

Contains a green substance - chlorophyll. Absorbs Suns energy so the plant can make its own food by photosynthesis

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10
Q

What is cytoplasm

A

Where the chemical reactions take place

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11
Q

Circulatory system

A

Transport of oxygen, carbon dioxide foods wastes and hormones helps protect the body from invading microbes

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12
Q

What is an ovary

A

The ovaries produce the eggs and the female hormones

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13
Q

What is a guard cell

A

Plant cells that exist in pairs with a hole between. Plant cells with a thick inner wall and thin outer it controls the opening and closing of holes that allow carbon dioxide into leaves

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14
Q

Nervous system

A

Conducts messages from one part of the body to another coordinate and control the body
Uses brain, ear, nerves, eye, spinal cord

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15
Q

What is the function of the liver

A

To control blood sugar levels

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16
Q

What is the function of the kidney

A

To filter waste substances out of the blood

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17
Q

What is a penis

A

The penis must be erect for the sperm to pass through

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18
Q

What are testis

A

Produces sperm and testosterone

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19
Q

What is an organism

A

A whole living thing e.g a plant, an animal or a human

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20
Q

What are the 8 organ systems

A 
Digestive
Respiratory
Circulatory
Excretory
Muscle-skeletal 
Nervous 
Male reproductive
Female reproductive
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21
Q

What is a uterus

A

A muscular sac where the baby develops

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22
Q

What is a cervix

A

The ring of muscle that closes the vagina when it meets the uterus

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23
Q

What is a scrotum

A

A fluid that keeps the sperm alive. The sperm and liquid are called semen

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24
Q

What is a palisade cell

A

Leaf cells containing many chloroplasts and they are the main cells that absorb light for photosynthesis

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25
Q

What are the 4 ways of seed dispersal

A

Wind
Animal (eating)
Animal (on fur)
Self dispersal

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26
Q

Red blood cell

A

No nucleus contains a red pigment called haemoglobin disc shaped large surface. Carries oxygen around the body

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27
Q

What is an egg cell

A

A large round animal cell. Half a set of chromosomes in the nucleus. Contains a large amount of cytoplasm. It fuses with the sperm to start a new life

28
Q

What is the function of the eye

A

Contains light receptors to see

29
Q

What is the function of the stomach

A

Kills bacteria in food starts digestion of protein

30
Q

What is the function of the nerve cell

A

Long extensions of cytoplasm surrounded by fatty cells. Carries messages called impulses around the body

31
Q

Ciliated epithelial cell

A

Lining cells with a row of hairs along one edge. Create a current to move an egg cell or to move mucus in the respiratory system

32
Q

What is implantation

A

The embryo settles into the uterus lining where it can start to grow and get food from the mothers blood

33
Q

What is ejaculation

A

Sperm are releases at the top of the vagina

34
Q

What is the equation for the magnification of a microscope

A

Magnification of eyepiece x magnification of object lens

35
Q

What 3 things happen when a woman is about to give birth

A

The amniotic sac bursts
The muscles of the cervix relax and widen then dilate up to 10cm
Muscles in the uterus will start to contract to push the baby out

36
Q

What fluid surrounds the baby

A

Amniotic fluid

37
Q

What is cell membrane

A

It holds the cell together. It’s semi permeable. Controls what passes in and out

38
Q

What is an organ

A

Groups of different tissues working together e.g a heart

39
Q

What is a cell

A

The building blocks e.g a muscle cell

40
Q

What is a tissue

A

Groups of similar cells e.g a muscle

41
Q

What is a urethra

A

Joins to the sperm tube carries urine and semen out of the body though the penis

42
Q

Name the 4 main organs of a plant

A

Petal, leaf, stem, root

43
Q

What is ovulation

A

When an egg is released from an ovary

44
Q

What is the function of the root

A

Anchors plant to the ground and absorbs water and minerals from the soil

45
Q

What is the function of the stem

A

Hold leaves up to the light and transports substances around the plant

46
Q

Male reproductive system

A

Produces sperm cells produces male sex hormone

Uses penis, testis

47
Q

Recite Mrs gren

A

Movement - changing place or position
Respiration - releasing energy from food
Sensitivity - awareness of the surroundings
Growth - an increase in size or number
Reproduction - creating new individuals
Excretion - removal of waste products
Nutrition - obtaining food to build a body

48
Q

What are the levels of organism

A

Cells-> tissue-> organ-> organ system-> organism

49
Q

Musclo-skeletal system

A

Supports the body moves the body and protects soft parts of the body
Uses muscles, bones

50
Q

Who invented the microscope

A

Anton van Leeuwenhoek

51
Q

What is cell division

A

The embryos splits into 2, 4, 8,16 cells etc

52
Q

What is pollination

A

The transfer of pollen from the anther of a flower to the stigma

53
Q

What is the function of the ovaries

A

Produce eggs and female hormones

54
Q

What is the function of the testes

A

Makes sperm and make male hormones

55
Q

What is the function of the heart

A

Pumps blood around the body

56
Q

What are the eight main organs of a human

A

Heart, liver, kidney, lungs, intestines, stomach, eyes, brain

57
Q

What is the function of the brain

A

To control the body

58
Q

What is the function of the lungs

A

To breathe in oxygen and out carbon dioxide

59
Q

Sperm cell

A

Half a set of chromosomes in the nucleus. Has a tail. Package of chemicals in the head to penetrate the egg. It swims to an egg to fuse with it

60
Q

What are the functions of the leaf

A

Absorbs light for photosynthesis and it makes food

61
Q

What is the function of the flower

A

For reproduction it makes seeds

62
Q

What is a nucleus

A

Controls the cell. It contains information to create a new living organism

63
Q

What is an oviduct

A

It carries the eggs away from the ovary and towards the uterus

64
Q

Excretory system

A

Removes waste from blood removes excess water from blood and produces and stores urine
Uses the kidney and bladder

65
Q

Root hair cell

A

Plant cells that have no chloroplasts. Have long extensions at the side to give a large surface area. Absorbs water and minerals from the soil

66
Q

What is a cell wall

A

Made of cellulose. Gives plant strength and support

Biology (16 decks)

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