Chapter 1 - Organisms Flashcards
(23 cards)
Unicellular organisms
An organism that is made up of only one cell
Multicellular organism
An organism with many cells
Layers of organisation
Cells, tissues, organs, organ systems, organism
Building blocks of life
Cells
Functions of the skeleton
To help the body to move, to support the body, to produce blood cells and to protect the vital organs
How do muscles work?
Your muscles are attached to bones so if it pulls on a bone it will cause it to move
What does bone marrow produce?
Blood cells
What covers the end of bones?
Cartilage
Hinge joints
For backwards and forwards movement (e.g. knee, elbow)
Ball and socket joint
All directions (e.g. hip and shoulder)
Fixed joint
Allows no movement
Muscles are a type of…
Tissue
MUSCLES CAN ONLY…..
PULL
Muscles work in..
PAIRS
How many main components in an animal cell?
Four; mitochondria, cytoplasm, cell membrane, nucleus
How many main components in a plant cell?
Seven; chloroplast, vacuole, cytoplasm, mitochondria, cell wall, nucleus, cell membrane
Specialised cells
Cells that change to suit a particular function
Structural adaptations
These are the adaptations are the differences in specialised cells
Nerve cells
They carry electrical impulses around your body
Red blood cells
They transport oxygen around the body
Sperm cells
Carry male genetic material
Leaf cells
Leaf cells are found at the top of a leaf, they absorb sunlight
Root hair cells
Root hair cells absorb water and nutrients
