1 / 10

The Skeletal System

Delve into the fascinating world of the nervous system, exploring neurons, brain functions, and the crucial role of the spinal cord. Learn about sensory, motor, and interneurons, as well as the different parts of the brain and their functions in controlling our actions and thoughts.

minty
Télécharger la présentation

The Skeletal System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Skeletal System

  2. The Nervous System • Nervous System – group of nerves and organs that controls all of our actions and thoughts • Nerves – made up of axons • Neurons– single nerve cell (basic unit of the nervous system) • The neuron has 3 main parts: • Cell body – houses the nucleus(DNA) • Axon– tail that the message travels along • Dendrite– the “fingers” on the body of the cell that receive the message from another cell **Synapse – the gap between neurons over which messages must jump

  3. Types of neurons • 3 types of neurons – • Sensory neurons – sense changes in the environment inside and outside the body; they carry impulses from the sense organs, the skin, the muscles, and the internal organs (touch a stove – neurons sense hot and send it to your brain) • Interneurons – receive sensory messages and send responses – found only in the brain and spinal cord (touch stove – realize your hand is burning – move hand) • Motor neurons – carry a response from interneurons to the muscles, glands, and internal organs – controls every body movement

  4. The Nervous System • The nervous system is like the boss of the body – it tells all of the other systems what to do! • Its organs include: • The brain (like the main computer) • The spinal cord (like the main telephone line) • Nerves (like radar detectors and small telephone lines)

  5. The Brain can be divided into 3 main parts… • Cerebrum • Cerebellum • Brain stem (medulla oblongata)

  6. Cerebrum • The Cerebrum controls functions such as memory, thought, decision making, feelings, and the five senses.

  7. Cerebellum • The cerebellum controls functions such as coordination, balance, and posture • What are some things you couldn’t do if your cerebellum was not functioning properly?

  8. Brainstem – add this to your notes! • Connects the brain to the spinal cord • Controls heart rate, breathing, digestion, and circulation • Also controls involuntary movements • Examples of involuntary movement???

  9. Spinal Cord • Spinal cord extends from the medulla to the ribs – it’s about 18 inches long and the diameter of a finger • The spinal cord is the main highway that links the brain to nerves and nerves to the brain and also regulates blood pressure and pulse • This highway sends and receives messages (electrical impulses) • It is protected by the spine (vertebra) – if it’s damaged you may not be able to feel or move from the point of damage

  10. Tonight’s Homework • What are the five functions of the skeletal system? • How many bones are in an adult skeleton? • How are bones classified? • What are the five internal and external characteristics of bone? • What are the two classifications of joints? Describe them.

More Related