WARM UP 42 2/19-20

The carrying capacity of a given environment is least dependent upon

A recycling of materials

B the available space

C the availability of food and water

D daily temperature fluctuations

HUMAN BODY SYSTEMSTCCHS 2014

Levels of Organization

The levels of organization in a multicellular organism—atoms, cells, tissues, organs, and organ systems.

Organism

Organ System

Organs

Tissues

Cells

Atoms

Cell Types and Tissue

A cell --the basic unit of structure and function in living things. Specialized cells are uniquely suited to perform a specific function.

Tissues are groups of cells that perform a specific function. Muscle Tissue: works with bones to enable body

to move. Epithelial Tissue: glands and tissues that cover

interior and exterior body surfaces. Connective Tissue: provides support for the

body and connects its parts. Nervous Tissue: transmits nerve impulses

throughout the body.

Human Body Systems

Each organ in your body is part of an organ system, a group of organs that work together to perform a major function.

Circulatory System

Your heart is part of your circulatory system, which carries oxygen and other materials throughout your body. Besides the heart, blood vessels are organs that work in your circulatory system.

Nervous System

The nervous system detects and interprets information from the environment outside the body and from within the body; controls most body functions. Structures include brain, spinal cord, and nerves.

Lymphatic System

The lymphatic system fights disease and collects fluid lost from blood vessels and returns the fluid to the circulatory system. Includes white blood cells, thymus, spleen, lymph nodes, and lymph vessels.

Excretory System

The excretory system removes wastes. The organs involved are the kidney, ureter, urinary bladder, and urethra.

Muscular System

The muscular system works with the skeletal system to enable the body to produce voluntary movement, moves food through the digestive system, and helps to circulate blood by keeping the heart beating. Includes muscles and tendons.

Skeletal System

The skeletal system supports the body, protects internal organs, allows movement; makes and stores blood cells and mineral reserves. Includes bones, cartilage, and ligaments.

Digestive System

The digestive system takes food into the body, breaks the food down into smaller particles, absorbs the digested materials, and eliminates wastes. Includes mouth, pharynx, esophagus, stomach, intestines, and rectum.

Respiratory System

The respiratory system takes oxygen into the body and eliminates carbon dioxide. Includes nose, pharynx, larynx, trachea, bronchi, bronchioles, aveoli, and lungs.

Endocrine System

The endocrine system controls many body processes using hormones.

It is responsible for growth, development, and metabolism.

This system also maintains homeostasis.

Includes pituitary, pineal, thyroid, thymus, adrenal, ovary and testes and pancreas.

Integumentary System

The integumentary system serves as a barrier against infection and injury. Also, it helps to regulate body temperature. Includes skin, hair, nails, sweat and oil glands.

Reproductive System

The reproductive system produces sex cells that can unite with other sex cells to create offspring; controls male and female characteristics. Includes (in males) testes, vas deferens, urethra, penis and (in females) uterus, ovaries, fallopian tubes, and vagina.