Unit 3 Lesson 3 How Do Cells Work

Unit 3 Lesson 3 How Do Cells Work Together? How do cells work together?

Unit 3 Lesson 3 How Do Cells Work Together? • Tissue: is made up

Unit 3 Lesson 3 How Do Cells Work Together? Organ: • An organ is

Unit 3 Lesson 3 How Do Cells Work Together? Let’s think together What ‘s

Unit 3 Lesson 3 How Do Cells Work Together? The Information Highway • Sensing

Unit 3 Lesson 3 How Do Cells Work Together? The Information Highway • The

Unit 3 Lesson 3 How Do Cells Work Together? The Information Highway Classwork 1:

Unit 3 Lesson 3 How Do Cells Work Together? Let’s think together Do you

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 2: Question 1 Copyright

Unit 3 Lesson 3 How Do Cells Work Together? What are the five senses?

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 2: Question 2 Copyright

Unit 3 Lesson 3 How Do Cells Work Together? Sight: - The eye is

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 2: Question 3 Word

Unit 3 Lesson 3 How Do Cells Work Together? Smell: • Inside the nose,

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 2: Question 4 Word

Unit 3 Lesson 3 How Do Cells Work Together? Taste: • Taste buds on

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 2: Question 5 Word

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 2: Question 6 Copyright

Unit 3 Lesson 3 How Do Cells Work Together? Hearing: How do we hear

Unit 3 Lesson 3 How Do Cells Work Together? Hearing: 2 -Sound vibrations are

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 3: Question 1 Word

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 3: Question 2 Complete:

Unit 3 Lesson 3 How Do Cells Work Together? The Skin You’re In •

Unit 3 Lesson 3 How Do Cells Work Together? Why is the skin important?

Unit 3 Lesson 3 How Do Cells Work Together? The Skin You’re In Copyright

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 3: Question 3 Copyright

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 3: Question 4 Copyright

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Unit 3 Lesson 3 How Do Cells Work Together? • Tissue: is made up of cells of the same type that work together to do a certain job. • The body has four different types of tissues: • 1 -Muscle tissue: responsible for movement. • 2 -Connective tissue: connects muscles to bone. • 3 - Nerve tissue: makes up your brain and spine. • 4 - Epithelial tissue: the outer layer of skin. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Organ: • An organ is made up of several tissues that work together to do a certain job. Organ system: • Organs that work together to do a job for the body make up an organ system. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? The Information Highway • Sensing your surroundings and communicating information are the jobs of your nervous system. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? The Information Highway • The nervous system is made of : 1 -Nerve cells: - Chains of long nerve cells make up nerves. - Nerves carry information to and from the brain. (Deliver messages) 2 - Brain: - processes information. 3 - Spinal cord : - A rope-like bundle of nerve tissue. - The main pathway for information travelling to and from the brain. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Let’s think together Do you think that all your body parts have got the same number of nerves ? And why? Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? What are the five senses? • Senses are your body’s way of gathering information. • Senses include sight, smell, hearing, taste, and touch. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Sight: - The eye is the sense organ that let you see. - The eye is sensitive(detects) light. 1 - Iris: It is the part of the eye that gives your eye color. 2 - Pupil: It’s an opening in the iris. Light enters the eye through the pupil. 3 -Retina: It’s at the back of the eye. It contains nerve cells that detect light. These nerve cells send signals to the brain. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Smell: • Inside the nose, tiny structures sense (detect) chemicals in the air. • These structures are attached to nerve cells in the olfactory bulb. • The olfactory bulb transmits smell information from the nose to the brain Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Taste: • Taste buds on the tongue sense (detect) chemicals in food. • Taste buds are attached to nerves that send messages to the brain. The brain interprets this information as taste. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Hearing: How do we hear sounds? 1 - The outer ear funnels sound into the middle ear causing the eardrum to vibrate. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Hearing: 2 -Sound vibrations are passed to tiny bones called the (hammer, anvil, and stirrup). 3 - These bones pass vibrations to the inner ear where a fluid-filled structure called the cochlea passes vibrations to tiny hairs on the nerves. 4 - These nerves send messages about vibrations to the brain and you hear. - Ears are sensitive to (detect ) vibrations. Outer ear tiny hair Ear drum nerves Bones Brain cochlea Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Classwork 3: Question 2 Complete: Ear is sensitive to ______ while the eye is sensitive to ______. Touch - Light – vibration - chemicals Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? The Skin You’re In • Skin is a protective layer that covers the body. • Skin, fingernails, toenails, and hair are part of the integumentary (covering)system. • The integumentary system protects the inside of the body. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? Why is the skin important? • Skin keeps germs out of the body and water in the body. • When you get too hot, sweat on the skin cools the body. • When you get too cold, hair keeps your head warm. • Hair also protects your skin. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 3 Lesson 3 How Do Cells Work Together? The Skin You’re In • The epidermis is your outer layer of skin. • The dermis is the inner layer of skin. It contains hair follicles, sweat glands, blood vessels, and nerve endings. • Nerve endings are special structures that sense touch, heat, cold, pain, pressure, and vibration. Copyright © Houghton Mifflin Harcourt Publishing Company