l evels of o rganization. f rom s mallest to l argest cell tissue organ organ system organism
TRANSCRIPT
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LEVELS OF ORGANIZATION
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FROM SMALLEST TO LARGEST
CellTissueOrgan
Organ SystemOrganism
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TYPES OF CELLS (THERE ARE OVER 20 KINDS)
Epithelial cells Gland cells Hormone secreting
cells Storage cells Barrier function cells Ciliated cells
Contractile cells Blood cells Sensory cells Neuron cells Lens cells Pigment cells Nurse cells
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TISSUES – ARE FORMED BY MANY CELLS COMING TOGETHER.
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THERE ARE FOUR MAIN TYPES OF TISSUES:
Epithelial Tissue - cells of epithelial tissue pack tightly together and form continuous sheets that serve as linings in different parts of the body. Examples: skin, inside of mouth, etc.
Connective Tissue - connective tissue adds support and structure to the body. Examples: tendons, ligaments, blood, bone, etc.
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Muscle Tissue - contains the specialized proteins actin and myosin that slide past one another and allow movement. Examples: skeletal, smooth, cardiac
Nerve Tissue - has the ability to generate and conduct electrical signals in the body. Examples: nerves
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ORGANS: A STRUCTURE THAT CONTAINS AT LEAST TWO DIFFERENT TYPES OF TISSUE FUNCTIONING TOGETHER FOR A COMMON PURPOSE
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THERE ARE MANY TYPES OF ORGANS
Liver Kidneys Heart Skin
Brain Lungs Spleen Pancreas
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ORGANS OF THE DIGESTIVE SYSTEM
Pancreas Liver Kidney Small Intestine Large Intestine
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PANCREAS
Produces enzymes to help digest our food. It adds the enzymes to the small intestine
after our food leaves the stomach Produces insulin which controls blood sugar
levels
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LIVER
Keeps blood sugar level constant
Filters harmful substances from the blood
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KIDNEY
Filters waste products (Urea) from the blood and sends them to the bladder
Helps retain water
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SMALL INTESTINE
Digests food and absorb nutrients into the blood stream.
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LARGE INTESTINE
Absorbs water from our waste before it leaves the body.
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BODY (ORGAN) SYSTEMS - ARE COMPOSED OF TWO OR MORE DIFFERENT ORGANS THAT WORK TOGETHER TO PROVIDE A COMMON FUNCTION.
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OUR BODIES HAVE 11 ORGAN SYSTEMS: CIRCULATORY SYSTEM, NERVOUS SYSTEM, SKELETAL SYSTEM, ENDOCRINE SYSTEM, REPRODUCTIVE, MUSCULAR, IMMUNE, URINARY (EXCRETORY), RESPIRATORY, SKIN, AND DIGESTIVE SYSTEMS.BODY SYSTEMS WE WILL DISCUSS: Respiratory Digestive Circulatory Skeletal Muscular Endocrine Nervous
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RESPIRATORY SYSTEM
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RESPIRATORY SYSTEM
Function? Obtain oxygen and
transfer it to the blood
Get rid of carbon dioxide
Dependence? Depends on
circulatory system to transport oxygen and CO2
Depends on nervous system to regulate breathing
All systems depend on it for oxygen and getting rid of CO2
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DIGESTIVE SYSTEM
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DIGESTIVE SYSTEM
Function? Obtain nutrients
from food Get rid of waste
Dependence? Depends on
circulatory system to transport food to all cells
Depends on nervous system to regulate muscle contraction of stomach, intestines
All systems depend on it for food and energy needs
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CIRCULATORY SYSTEM
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SKELETAL SYSTEM
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MUSCULAR SYSTEM
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ENDOCRINE SYSTEM
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ENDOCRINE SYSTEM
Parts Thyroid gland Adrenal gland Pancreas
Function? Controls chemical
reactions by releasing hormones from glands.
Examples: Growth and development, blood sugar levels, adrenaline,
Dependence on other systems? Controls breakdown
of food Depends on
circulatory system to transport hormones
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NERVOUS SYSTEM
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NERVOUS SYSTEMS
Parts Brain Spinal Chord Nerves
Function Receive information
from senses, process it, and send signals to respond
Dependence Skeletal system
protects it Digestive system
provides food for energy
Controls muscle contraction, and just about everything else
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CHICKEN
Muscle Tendons Skin Bone Bone marrow – if you can break the bone Layer between skin and muscle Layer between muscle and bone Fat
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ORGANISMS - ENTIRE LIVING THINGS THAT CAN CARRY OUT ALL BASIC LIFE PROCESSES.
Bacteria Amoeba Mushroom Sunflower Human
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WHAT DO WE NEED TO DO IN ORDER TO SURVIVE
Getting energy Respiratory system – gets oxygen Digestive system – gets nutrients from food
Getting rid of waste Respiratory system – gets rid of carbon dioxide Digestive system – gets rid of stuff we don’t use
from our food Urinary system – gets rid of waste products from
the rest of our body Regulating bodily functions
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Regulating bodily functions Nervous system – brain controls heart beat,
breathing, contraction of stomach and intestines and many more
Endocrine system – releases hormones which control chemical reactions in our body
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Muscular Skeletal Digestive Reproductive Respiratory Circulatory
(cardiovascular)
Nervous Urinary Immune Skin
(integumentary) Endocrine Lymphatic
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BODY SYSTEMS TO CHOOSE FROM
Respiratory Digestive Cardiovascular (circulatory) Skeletal Muscular