Human Body Systems

Monday, April 30 WARM-UP: Do CST Practice Problems (1-10) DO NOT WRITE ON THE TEST! Put your answers on the blue paper. Turn in your poster- “Do Your Part to be Earth Smart” HW: Read 35-2 and do the review Notebooks due: Friday, May 4th

Human Body Systems Section 35–1 This section describes human organ systems and explains how the body maintains homeostasis.

Warm-Up: What are the 11 organ systems of the human body? Integumentary (skin), nervous, muscular, digestive, skeletal, reproductive, endocrine, respiratory, circulatory (cardiovascular), excretory/urinary, immune/lymphatic

Immune

Tuesday, May 1st Warm-Up: What is Physiology? Physiology – the study of the structure and function of the human body HW: Read 35-2 and do the review Notebooks due Friday May 4th

Use Ch. 35-1 to do the following in your notebook: (paste into notebook) Describe the levels of organization in the body (cells, tissues, organs, organ systems) and give an example of each (p. 891) Write down and draw each of the 11 organ systems and their functions. (p. 892-893) Explain the difference between the four types of tissues. (p. 894) Define homeostasis. (p. 895)

Levels of Organization Cells Tissues Organs

Levels of Organization of the Body Specialized Cells have a particular function. Tissues are a group of specialized cells that perform a single function. Organs are a group of tissues that work together to perform a complex function. Organ Systems are a group of organs that work together to perform closely related functions.

Nervous System Function Recognizes and coordinates the body’s response to changes in its internal and external environments using the brain and nerves

Integumentary System Function Serves as a barrier against infection and injury; helps to regulate body temperature; provides protection against UV radiation from sun.

Respiratory System Function Provides O2 needed for cellular respiration and removes CO2 from body.

Digestive System Function Converts food into simpler molecules that can be absorbed into bloodstream and then used by cells of body; eliminates waste.

Excretory System Function Eliminates waste products from body using kidneys, bladder and urine to maintain homeostasis.

Skeletal System Function Supports the body; protects internal organs; allows movement; stores minerals; provides site for blood cell formation.

Muscular System Function Works with skeletal system to produce voluntary movement (skeletal muscle); helps circulate blood (cardiac muscle) and moves food through digestive system (smooth muscle).

Circulatory System Function Brings O2, nutrients and hormones to cells through the blood; fights infection; removes cell waste through the blood; helps regulate body temperature.

Endocrine System Function Uses hormones to control growth, development and metabolism; maintains homeostasis.

Reproductive System Function Produces reproductive cells; in females, nurtures and protects developing embryo.

Immune/Lymphatic System Function Protects the body from disease; collects fluid lost from blood vessels and returns the fluid to the circulatory system.

Explain the difference between the four types of tissues. Epithelial tissue includes glands and tissues that cover interior and exterior body surfaces.

Explain the difference between the four types of tissues. Connective tissue provides support for the body, insulates and connects its parts. Examples: Fat, cartilage, bones, tendons, and blood.

Explain the difference between the four types of tissues. Nervous tissue transmits nerve impulses throughout the body.

Explain the difference between the four types of tissues. Muscle tissue enables movement of body and its structures by muscle contraction. 3 types: skeletal, cardiac and smooth

Homeostasis: the process by which organisms keep their internal conditions relatively stable; threatened by changes in the environment. Ex: sweating, panting, shivering, osmosis, dilation of pupils

Endothermy (being warm-blooded) Endothermy enables the body to maintain homeostasis at all times, regardless of the temperature outside the body.

Nervous system Coordinates the body’s response to changes in its internal and external environments Skeletal system   Stores mineral reserves and provides a site for blood cell formation Integumentary system   Serves as a barrier against infection and injury Endocrine system    Eliminates wastes and maintains homeostasis Lymphatic/Immune systems Helps protect body from disease. Muscular system Helps produce voluntary movement, circulate blood, and move food Reproductive system Produces reproductive cells Respiratory system Provides oxygen and removes carbon dioxide Excretory system Eliminates wastes and maintains homeostasis Circulatory system Brings materials to cells, fights infection, and helps to regulate body temperature Digestive system Converts food so it can be used by cells