This laboratory session was conducted to understand how muscles and tissues work together in our bodies to make daily activities possible. Each pair of students observed three types of muscles (skeletal, smooth and cardiac) under the microscope. While observing the muscle through the eyepiece, they drew what they saw in the field of view in the results section for later observation. After observing the muscles, they took slides of bone and cartilage and also looked at them under a microscope. The bone blade used was part of the ground bone while the cartilage used was elastic cartilage, fibrous cartilage and hyaline cartilage. Like the previous tissues, these have also been drawn and labeled in the results section to be observed later and understand how our bodies work together and help us do what we want to do.II- Introduction: For vertebrates are supported and move, certain tissues are involved, including muscles, bones and cartilage. When muscles contract, they produce movement and the muscle movement emits heat to help control our body temperature; therefore, there are three different types of muscle tissue: cardiac, skeletal, and smooth. Cardiac muscle is the muscle found only in the heart; therefore, the prefix “cardio” means “heart” in Greek (Miller, Levine. (2006). Pearson Prentice Hall. Biology.). This muscle appears to be striated, meaning it has alternating light and dark bands (striations) that include red and white fibers and contain proteins. These red fibers are rich in oxygen and can be classified as slow oxidative, meaning they have a slow contraction. White fibers are actually low in oxygen and are rapidly glycolidtic, meaning they have a rapid twist...... middle of paper ......http://www.mayoclinic.com/health /muscular-dystrophy /DS00200/DSECTION=symptoms4.) Nordqvist, C. (March 2011). Medical news today. What is achalasia?. Retrieved from: http://www.medicalnewstoday.com/articles/219314.php5.) Author not mentioned. (nd). WebMD. Heart valve disease. Retrieved from: http://www.webmd.com/heart-disease/guide/heart-valve-disease6.) Mayo Clinic Staff. (2013). Osteoporosis. Retrieved from: http://www.mayoclinic.com/health/osteoporosis/DS001287.) Mayo Clinic Staff. (2013). Osteoarthritis. Retrieved from: http://www.mayoclinic.com/health/osteoarthritis/DS000198.) Shiel, W. (2013). Medicine net. Recurrent polychondritis. Retrieved from: http://www.medicinenet.com/relapsing_polychondrite/article.htm9.) Mayo Clinic Staff. (2013). Herniated disc. Retrieved from: http://www.mayoclinic.com/health/herniated-disk/DS00893