Organs and Organ Systems Levels of Cell Organization

Organelles Cells Tissues ________________ join together to form cells, and create life. ____________ join together to form tissues. ____________ are groups of similar shaped cells that together carry out a common function. Cells Tissues There are four main tissue types:

Epithelial tissue: skin This is a covering and ___________ layer of cells. Includes _______ and stomach lining. protective skin

ii) Connective Tissue: this tissue gives ________ to other tissues, as well as holding them together. Includes ____________ and ___________. Connective tissue has both fibrous proteins and a material found between it’s cells, called the matrix. This can be fluid, in the case of blood, or more solid, in the case of bone. support ligaments blood

iii) Muscle Tissue: Rich in special contractile protein, this tissue enables _____________ when stimulated. There are different types of muscle, some of which we consciously contract (_________ muscle) and other types that we don’t have to think about contracting (________ muscle) movement skeletal smooth

iv) Nerve Tissue: the essential task of this tissue is to provide ________________. includes the _______, _____________, and nerve cells throughout the body. communication brain spinal chord

4) Organs Organs are groups of different __________ joined together to carry out a ________________ Examples of organs are… tissues specific function

5) Organs Systems Organ systems are many organs that have a ________ function. related

6) Organism Organ systems join together to form a living organism. Organisms vary greatly in their complexity. Mammals (including humans) are among the _____ complex. most

Homeostasis: Maintaining a constant internal environment

Body Temperature: An Example of Homeostasis in action