Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Endomembrane system wikipedia , lookup
Cytokinesis wikipedia , lookup
Cell growth wikipedia , lookup
Cellular differentiation wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cell encapsulation wikipedia , lookup
Cell culture wikipedia , lookup
List of types of proteins wikipedia , lookup
Science review: test date – Thursday, June 11th 1.12 Cells and cell systems a. tissue – a group of cells that are similar in shape and function b. organs – tissue that are organized into large structures c. organ systems – groups of organs that have related functions be able to compare the levels of cell organization with that of a hockey organization: - cell…….player - tissue….team - organ….league - organ system…..Hockey Canada study the chart on pg. 32, 33 the animal body is composed of basically four kinds of tissues: - epithelium - connective (bone, cartilage, blood) - muscle - nervous 1.13 Unicellular organisms Recall the short visuals I showed you on bacteria and microorganisms that could be in your home and on your skin. Humans are multicellular organisms Microorganisms are made up of only one cell; they are only visible under a microscope Bacteria are an example of microorganisms: they cause many diseases; but many are harmless and some are helpful Bacteria are more primitive than other cells because they do not have a nuclear membrane 1.14 The Need for Cell Division Why is cell division important? It determines the continuation of a species It contributes to tissue growth Helps heal wounds Aids in the normal replacement of old cells in tissue such as skin Cell division is the process where living cells reproduce their own kind Growth can be described in terms of an increase in the number of cells (some of you have really increased your number of cells his year ) Are cells all the same size? No. Some cells in your body are larger than others. Cells in fat tissue are bigger than cells in muscle tissue. Cells that must do a lot of work are usually smaller than cells that are less active. The more active a cell is, the more nutrients it needs and the more wastes it produces. 1.21 Organ systems working together Study the chart on pg. 54. Be able to identify the organs within the organ systems Organs that supply nutrients and remove wastes: Heart Artery Stomach Kidney Organs that regulate the body (recall the standing on one leg with eyes closed): Eyes Brain How do nerves and muscles work together? Nerves signal he muscles to contract. 1.22 Fluid Movement in Animals Why do multicellular animals need an excretory system and a circulatory system? Each cell of the body must be able to get rid of waste materials. Each cell of the body requires oxygen and nutrients. A circulatory system provides these. Compare the way plants and animals move fluids. Plants do not have a pump to move the fluids. Animals use a pump (heart) to move fluids through a circulatory system. 1.23 Animal Digestive Systems What is digestion? It’s the process where large food molecules are broken down into smaller molecules. Summarize human digestion. Mouth – starch digestion begins Stomach – initial digestion of proteins Small intestine – completed digestion of proteins, carbohydrates and fats