7th Grade: Resources for Activity 23-2, page 642-643

Use the links in this article to answer the following questions.

Pictures of Human Blood, Bird Blood, and Frog Blood. Red blood cells are called erythrocytes, white blood cells are called lymphocytes, and platelets are called thrombocytes.

You can also see this human lymphocyte with special stain under a microscope, and scanning electron microscope (SEM) pictures of an individual human lymphocyte and human blood. From these pictures, and the three microscope slides of different bloods, answer the questions below.

In your classwork notebook, answer the Analyze and Apply questions as well as you can. Observe carefully.

Cells and Tissues: Animations and Pictures

Here are some animations and pictures of cells and tissues at work.

Cells are the smallest individual living things. Tissues are groups of cells that work together to perform a certain job. Your body depends on both of them to stay healthy and alive.

Animations:
Cilia in protists
BioVisions: Inner Life of the Cell
Body to Cell
Muscle Cell Contraction
Preparing cell slides
Red blood cells

Pictures:
Man with skin, muscles, nerves, and blood vessels
Bicep muscle joined to arm and hand ligaments
Muscle parts
Body with muscles - diagram, front
Body with muscles - diagram, back
Bone cross-section