THE ORGANIZATION OF CELLS 1.CELLS: BASIC UNIT OF ALL LIFE 2.TISSUES: GROUPS OF SIMILAR CELLS THAT...
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Transcript of THE ORGANIZATION OF CELLS 1.CELLS: BASIC UNIT OF ALL LIFE 2.TISSUES: GROUPS OF SIMILAR CELLS THAT...
![Page 1: THE ORGANIZATION OF CELLS 1.CELLS: BASIC UNIT OF ALL LIFE 2.TISSUES: GROUPS OF SIMILAR CELLS THAT WORK TOGETHER MUSCLE TISSUE: ALLOWS MOTION, CAN ONLY.](https://reader036.fdocuments.us/reader036/viewer/2022062409/56649cb65503460f9497a6b1/html5/thumbnails/1.jpg)
THE ORGANIZATION OF CELLS 1. CELLS: BASIC UNIT OF ALL LIFE
2. TISSUES: GROUPS OF SIMILAR CELLS THAT WORK TOGETHER
• MUSCLE TISSUE: ALLOWS MOTION, CAN ONLY CONTRACT
• CONNECTIVE TISSUE: SUPPORTS AND BINDS BODY PARTS (BONES, TENDONS)
• EPITHELIAL TISSUE: COVERS THE ORGANS AND BODY (SKIN)
• NERVE TISSUE: ALLOWS COMMUNICATION, THOUGHT PROCESSES
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3. ORGANS: DIFFERENT TISSUES COMBINE TO PERFORM ONE FUNCTION HEART PUMPS BLOOD
• MADE OF BLOOD, CONNECTIVE, MUSCLE, NERVE, EPITHELIAL TISSUES• HARDEST WORKING MUSCLE IN THE BODY
• SKIN MADE OF ALL 4 MAJOR TISSUES• COVERS AND PROTECTS BODY• CONTROLS TEMPERATURE AND SENSES TOUCH
4. ORGAN SYSTEMS: DIFFERENT BUT RELATED ORGANS THAT PERFORM SPECIFIC FUNCTION ex.: CIRCULATORY SYSTEM: INCLUDES HEART, BLOOD AND BLOOD VESSELS Ex.: SKELETAL SYSTEM: CONSISTS OF BONES, LIGAMENTS
5. ORGANISMS: A LIVING THING MADE OF ORGANS SYSTEMS
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NERVE TISSUE: CONDUCTS INFORMATION USING IMPULSES1. ALLOWS THE SENSING OF SURROUNDINGS2. ALLOWS REACTION TO SURROUNDINGS3. ALLOWS THOUGHT
NERVOUS SYSTEM: COMPRISED OF BRAIN, SPINE AND NERVES1. CHAINS OF NERVE CELLS FORM LONG NERVES
COMMUNICATE INFORMATION NERVES CONDUCT MESSAGES (IMPULSES) MADE OF ELECTRICAL SIGNALS
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2. SPINAL CORD: ROPE-LIKE BUNDLE OF NERVES ALONG THE BACK
CONNECTS ALMOST ALL PARTS OF THE BODY TO THE BRAIN
BONY SPINAL COLUMN PROTECTS DELICATE NERVES
3. BRAIN: TRILLIONS OF NERVE CELLS THAT WORK TOGETHER
RECEIVES AND INTERPRETS INFORMATION FROM SENSES
DECIDES ON RESPONSES TO SENSORY INFORMATION
SENDS RESPONSES TO THE MUSCULAR SYSTEM, etc.
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THE FIVE SENSES: SIGHT, SMELL, TASTE, HEARING, AND TOUCH1. EYE: THE ORGAN OF SIGHT
PUPIL: DARK OPENING OF THE EYE IRIS: COLORS PORTION, OPENS AND CLOSES TO ADJUST LIGHT ENTERING EYE LENS: CHANGES SHAPE TO FOCUS (TINY MUSCLES THINS OR THICKEN LENS) RETINA: LIGHT SENSITIVE REDDISH LINING OF EYE HAS COLOR SENSING CONE-SHAPED CELLS DIRECTLY BEHIND PUPIL BLACK-WHITE SENSING ROD-SHAPED CELLS AROUND CONES OPTIC NERVE SENDS INFORMATION TO BRAIN SOME PEOPLE LACK CONES FOR RED, SELDOM LACK GREEN OR BLUE CONES
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2. EAR: THE ORGAN OF HEARINGOUTER EAR: CAPTURES AND FUNNELS SOUND WAVES INTO EAR EAR CANAL: TUBE THAT LEADS TO EARDRUM EARDRUM: VERY THIN MEMBRANE THAT VIBRATES WHEN STRUCK BY SOUNDS MIDDLE EAR BONES (HAMMER, ANVIL, STIRRUP) AMPLIFY VIBRATIONS INNER EAR(COCHLEA): SNAIL-SHAPED, FLUID-FILLED STRUCTURE CONTAINS 1,000s OF TINY NERVE ENDINGS (ONE PER TONE HEARD) SENDS INFORMATION THROUGH AUDITORY NERVE TO BRAIN
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THE FIVE SENSES: SIGHT, SMELL, TASTE, HEARING, AND TOUCH 3. NOSE: HAS OLFACTORY BULB THAT SENSES SMELLS
• SMELLS ARE THE MOLECULES (CHEMICALS) GIVEN OFF BY MANY SUBSTANCES• OLFACTORY NERVE SENDS INFORMATION TO THE BRAIN• SMELL IS THE MOST VARIABLE SENSE FROM PERSON TO PERSON
4. TONGUE: THE ORGAN OF TASTE• TASTE BUDS: IN GROUPS OR “PITS” FOUND ON THE TONGUE• EACH GROUP SENSES A PARTICULAR TYPE OF CHEMICAL• 4 PRIMARY TYPES OF TASTES: SWEET, SOUR, BITTER, SALTY plus MEATY
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THE FIVE SENSES: SIGHT, SMELL, TASTE, HEARING, AND TOUCH5. SKIN: SENSE OF TOUCH- ALSO PROTECTS, REMOVES WASTES, HEAT
PART OF INTEGUMENTARY SYSTEM THAT INCLUDES HAIR AND FINGERNAILSEPIDERMIS: OUTER, PROTECTIVE LAYERS OF DEAD SKIN CELLSDERMIS: LIVING LAYERS OF SKIN
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DERMIS: LIVING LAYERS OF SKINOIL GLANDS: MAKES OIL THAT LUBRICATES THE SKINHAIR FOLLICLES: GROW HAIRSWEAT GLAND: PRODUCES SWEAT THAT EVAPORATES TO COOL BODYHAIR MUSCLE: PULLS ON HAIR, CLOSES HAIR PORE (GOOSE BUMP)FAT: INSULATES THE BODY (KEEPS HEAT IN)SEVERAL TYPES OF SENSORY NERVE ENDINGS (PAIN, TOUCH, HEAT, COLD, PRESSURE AND VIBRATION)TINY BLOOD VESSELS (CAPILLARIES) SUPPLY BLOOD