Download Connective tissue - Miss Woods` Class

HOW SUBSTANCES MOVE INTO AND
OUT OF CELLS
HOW THINGS MOVE IN AND OUT OF A CELL
Cells are constantly moving things in and out:
gases, food, water, wastes
The cell membrane is the structure in the cell that allows this to happen.
It is a semipermeable membrane.
HOW THINGS MOVE IN AND OUT OF A CELL
There are two main ways that cells move substances
Diffusion
Osmosis
HOW THINGS MOVE IN
AND OUT OF A CELL
Diffusion: The movement of particles
from an area of high concentration to
low concentration
The particles are spreading out evenly
HOW THINGS MOVE IN AND OUT OF A CELL
Osmosis: the diffusion of water
The amount of water in the cell needs to be a certain level. So if there is too much inside they
need a way to get some out. If there is too little inside they need a way to get some in.
OSMOSIS IN BLOOD CELLS
PRACTICE QUESTIONS
1. The terms diffusion and osmosis seem to have similar meanings. Explain how they are
similar. Then give a reason why scientists use two separate terms.
2. Martin volunteered to carry drinks to the class hosting a surprise party for a retiring
teacher. He isn’t sure which classroom is the right one, but he does know the students plan
to serve pizza and popcorn. Explain how Martin could use the smell as a clue.
CELLS IN MULTICELLULAR ORGANISMS
COMBINE TO FORM TISSUES AND ORGANS
HOW CELLS REPRODUCE
Multicellular organisms have specialized cells.
Which means the cells have specific jobs that they do to support life.
The cells have developed structures to help them do their jobs.
For example blood cells have to carry oxygen to small places so their thin, pliable disc shape helps
them do this.
ANIMAL TISSUE
Similar cells form together to create tissue.
There are 4 different types:
connective, epithelial, nervous and muscle
Organs are made up of a combo of these four tissues.
ANIMAL TISSUE
Connective tissue: supports and connects different parts of the
body. Blood is a connective tissue and so is fat , cartilage, bones
and tendons
Epithelial tissue: covers the surface of your body and the outside of
your organs. it also lines the inside of some of the organs
Nervous tissue: makes up the brain spinal cord and nerves
Muscle tissue: allows you to move. One type of muscle allows you to
move your body. Cardiac muscle tissue pumps blood through your
heart, and smooth muscle moves food along your intestine.
PLANT TISSUE
Plants have 3 types of tissue: photosynthetic/storage, protective, and transport
These types of tissues are organized to for the three organs of a plant.
leaves
roots
stem
Plants do not have organ systems but the organs do still interact with each other.
PLANT TISSUE
Turn to page 123 of textbook
Leaf
Protective tissue: waterproof layer, protect the plant
Transport tissue: tube like cells with hollow centre, phloem transports food, xylem transports water
Photosynthetic tissue: use sunlight to produce sugar that the plant uses for energy
PLANT TISSUE
See page 124
Stem
Protective tissue: waterproof and protective layer
Transport tissue: phloem- food, xylem- water
Storage: support plant and store food
PLANT TISSUE
See page 124
Root
Protective tissue: absorb water from soil
Transport tissue: brings in water and nutrients
Storage tissue: stores food