B2.2 Tissues, organs and organ systems Flashcards

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1
Q

What id differentiation?

A

The process by which cells become specialised for a particular job

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2
Q

Why do cells differentiate?

A

so they can perform different functions

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3
Q

When do cells differentiate in an organism?

A

during the development

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4
Q

What is a tissue?

A

A group of cells with a similar structure and function

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5
Q

What are some examples of tissues and what do they do?

A

muscular tissue- contracts to bring about movement

glandular tissue- produces substances such as enzymes and hormones

epithelial tissue- covers some parts of the body

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6
Q

What are organs made out of?

A

tissues

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7
Q

What tissues does the stomach contain and what do the tissues do in the stomach?

A

muscular tissue- churns the contents

glandular tissue- produces digestive juices

epithelial tissue- covers the outside and inside of stomach

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8
Q

What is an organ system?

A

groups of organs that perform a particular function

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9
Q

What do humans and other mammals use the digestive system to do?

A

to exchange substances with the environment

eg take in nutrients and release substances like bile

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10
Q

Describe the digestive system

A

glands- pancreas + salivary glands, produce digestive juices

stomach + small intestine, where digestion occurs

liver, produces bile

small intestine, where the absorption of soluble food occurs

large intestine, where water is absorbed from undigested food, producing faeces

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11
Q

What are 3 plant organs?

A

stems, roots and leaves

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12
Q

What are some examples of plant tissue and what is their function?

A
  • epidermal tissues, cover the plant
  • mesophyll, carries out photosynthesis
  • xylem and phloem, transport substances around the plant.
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13
Q

What type of organisms develop systems for exchanging materials?

A

large multicellular organisms

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14
Q

Describe the structure of the leaf and the functions of the tissues in the leaf

A

Epidermis- cover the plant

mesophyll- where photosynthesis occurs

phloem and xylem- transport substances

waxy cuticle- reduces water loss

stomata- allow carbon dioxide in. size is controlled by guard cells

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