There are three kinds of neurons; they are interneurons, sensory neurons, and motor neurons. Together they make up a chain of nerve cells. The sensory neurons pick up the internal or external stimuli and convert them into a nerve impulse. The interneurons are the neurons that carry the nerve impulses from one neuron to another. The motor neuron sends the impulse to a muscle an the muscle contracts in response to the impulse.

THANKS!!
~ Natalie and Matthew

There are three stages of human development before birth. The first is the zygotic stage. In this stage, the egg has just been fertilized by the sperm, and is beginning to multiply. It goes from one cell, to two cells, to four cells, to eight cells, and so on. It eventually forms into a hollow ball of hundreds of cells. This hollow ball then implants itself on the side of the uterus. From this point on, it is called the embryo. The inside of this hollow ball continues to grow, and the placenta, umbilical cord, and amniotic sac begin to form. After the embryo has grown for nine weeks, it becomes a “fetus.” While it is in the fetal stage, it begins to look more baby-like, or humanoid. In the last three months of development, the fetus is prepared to survive outside of the mother’s body. Important organs, such as the brain, lungs, and heart develop. After about nine months of overall development inside the uterus, the baby is ready to survive in the outside world and is ready to be born.

Feel better, Mr. Kremer! See you soon.

*Cell Walls are only in plant cells! (No asterisks on it in post above)

Summary
Plant and animal cells are both different but alike. Plant cells have one more organelle than animal cells and are much more rectangular. They also have chloroplasts and a cell wall. Animal cells have a more round shape and contain a lysosome. Apart from these small differences, they are very alike in their functions.

Key Terms
1. Nucleus – brain
2. Nucleolus – contains genetic material
3. Cell Wall – supports/protects
4. Endoplasmic Reticulum – transporters
5. Cytoplasm – gel-like fluid
6. Golgi Bodies – packages proteins to lipids
7. Vacuole – storage
8. Mitochondria – converts food to energy
9. Cell Membrane – doorway
10. Chloroplasts – convert sunlight into food*
11. Ribosome – makes proteins
12. Lysosome – breaks apart dead organelles**

*=only in plant cells
**=only in animal cells

The skeletal system provides shape and support, enables you to move, protects your internal organs, produces blood cells, and stores certain materials until your body needs them. The muscular system enables the body to move; moves food through the digestive system, and keeps the heart beating. The digestive system breaks down food into molecules the body can use, then the molecules are absorbed into the blood and carried throughout the body, then the wastes are eliminated from the body. The cardiovascular system carries needed substances to cells and carries waste products away from cells. The Respiratory system functions to move oxygen from the outside environment into the body, also it removes carbon dioxide and water from the body. The excretory system collects and removes wastes from the body. All of these systems work together to help the body stay healthy, strong, and maintain homeostasis.

olivia emma and andye