Tissues, organs and organ systems Flashcards
What is a tissue?
A tissue is a group of specialised cells that have a similar structure and function.
What is a Glandular tissue?
Produces substances such as enzymes and hormones
What is a Muscular tissue?
Contracts, bringing about movement
What is an Organ?
Organs are made of tissues. A particular organ may contain several different tissues.
Name the three tissues in the stomach and their purpose
Muscular tissue - to churn the food and other contents of the stomach
Glandular tissue - to produce digestive juices including acid and enzymes
Epithelial tissue - to cover the inner and outer surfaces of the stomach
Name a few organ systems
The nervous system
The respiratory system
The reproductive system
The digestive system
What is the purpose of the Pancreas and salivary glands
Produce digestive juices
What does the Liver produce?
Bile
What does the small intestine do?
Digest and absorb soluble food
What does the large intestine do?
Absorbs water from undigested food, producing faeces
Name the three main plant tissues
Epidermal tissue
Mesophyll
Xylem and phloem
What does the Mesophyll do?
Carries out photosynthesis
Purpose of the xylem and phloem?
Transport of substances around the plant
What is the purpose of the epidermal tissue?
To covers the plant
Name the three plant organs
Roots, stem and leaves
Name some of the adaptations plants have
Chlorophyll Large surface area Stomata Thin Network of veins
What is the purpose of chlorphyll?
To absorb sunlight
True or false: Large surface area helps to absorb more sunlight
True
The stomata…
Lets carbon dioxide diffuse into the leaf
What is the purpose of the adaptation ‘thin’
Short distances for carbon dioxide to diffuse into the leaf cells
The purpose of network of veins?
To support the leaf and transport water and carbohydrates
Adaptations of the internal structure of a leaf to allow efficient photosynthesis?
Spongy mesophyll inside the leaf Layer of palisade cells on the top surface Many chloroplasts in the palisade cells Thin, transparent epidermis Thin, waxy cuticle made of wax
Which adaptation protects the leaf without blocking out light?
Thin, waxy cuticle made of wax
Which adaptation allows more light to reach the palisade cells?
Thin, transparent epidermis
