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Biology > Year 7 Work > Flashcards

Year 7 Work Flashcards

(66 cards)

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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
What are the 4 ways of seed dispersal
Wind Animal (eating) Animal (on fur) Self dispersal
26
Red blood cell
No nucleus contains a red pigment called haemoglobin disc shaped large surface. Carries oxygen around the body
27
What is an egg cell
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
What is the function of the eye
Contains light receptors to see
29
What is the function of the stomach
Kills bacteria in food starts digestion of protein
30
What is the function of the nerve cell
Long extensions of cytoplasm surrounded by fatty cells. Carries messages called impulses around the body
31
Ciliated epithelial cell
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
What is implantation
The embryo settles into the uterus lining where it can start to grow and get food from the mothers blood
33
What is ejaculation
Sperm are releases at the top of the vagina
34
What is the equation for the magnification of a microscope
Magnification of eyepiece x magnification of object lens
35
What 3 things happen when a woman is about to give birth
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
What fluid surrounds the baby
Amniotic fluid
37
What is cell membrane
It holds the cell together. It's semi permeable. Controls what passes in and out
38
What is an organ
Groups of different tissues working together e.g a heart
39
What is a cell
The building blocks e.g a muscle cell
40
What is a tissue
Groups of similar cells e.g a muscle
41
What is a urethra
Joins to the sperm tube carries urine and semen out of the body though the penis
42
Name the 4 main organs of a plant
Petal, leaf, stem, root
43
What is ovulation
When an egg is released from an ovary
44
What is the function of the root
Anchors plant to the ground and absorbs water and minerals from the soil
45
What is the function of the stem
Hold leaves up to the light and transports substances around the plant
46
Male reproductive system
Produces sperm cells produces male sex hormone | Uses penis, testis
47
Recite Mrs gren
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
What are the levels of organism
Cells-> tissue-> organ-> organ system-> organism
49
Musclo-skeletal system
Supports the body moves the body and protects soft parts of the body Uses muscles, bones
50
Who invented the microscope
Anton van Leeuwenhoek
51
What is cell division
The embryos splits into 2, 4, 8,16 cells etc
52
What is pollination
The transfer of pollen from the anther of a flower to the stigma
53
What is the function of the ovaries
Produce eggs and female hormones
54
What is the function of the testes
Makes sperm and make male hormones
55
What is the function of the heart
Pumps blood around the body
56
What are the eight main organs of a human
Heart, liver, kidney, lungs, intestines, stomach, eyes, brain
57
What is the function of the brain
To control the body
58
What is the function of the lungs
To breathe in oxygen and out carbon dioxide
59
Sperm cell
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
What are the functions of the leaf
Absorbs light for photosynthesis and it makes food
61
What is the function of the flower
For reproduction it makes seeds
62
What is a nucleus
Controls the cell. It contains information to create a new living organism
63
What is an oviduct
It carries the eggs away from the ovary and towards the uterus
64
Excretory system
Removes waste from blood removes excess water from blood and produces and stores urine Uses the kidney and bladder
65
Root hair cell
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
What is a cell wall
Made of cellulose. Gives plant strength and support

Biology (16 decks)

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