Stegosaurus dinosaur belonged to the late jurassic period i.e Kimmeridgian to early tithonian, is a large quadriped with unusual posture, heavy back, short forelimbs, spiked tail. Integumentary system is that which is composed of skin and its appendages. Its primary function is to protect the body from external injury, temperature regulation, cushioning and self defense. Stegosaurus skin is made up of dermal plates. They arise from the skin, the largest of them measured 2 ft wide. Their size is largest on hip and smallest on neck region. It helped in selfdefense and regulation of body temperature. The plates were supplied with blood through the blood vessels and the air flow through the plates is hypothesized to have regulated the body temperature. The plates were in double row as per findings in late 1960\'s. Lymphatic system: There is little evidence to clearly understand the lymphatic system although it is hypothesized that they had a 4 chambered heart and were warmblooded with a well functioning circulatory system. They had higher aerobic capacity and higher pressure or higher gas exchange circulatory system. Solution Stegosaurus dinosaur belonged to the late jurassic period i.e Kimmeridgian to early tithonian, is a large quadriped with unusual posture, heavy back, short forelimbs, spiked tail. Integumentary system is that which is composed of skin and its appendages. Its primary function is to protect the body from external injury, temperature regulation, cushioning and self defense. Stegosaurus skin is made up of dermal plates. They arise from the skin, the largest of them measured 2 ft wide. Their size is largest on hip and smallest on neck region. It helped in selfdefense and regulation of body temperature. The plates were supplied with blood through the blood vessels and the air flow through the plates is hypothesized to have regulated the body temperature. The plates were in double row as per findings in late 1960\'s. Lymphatic system: There is little evidence to clearly understand the lymphatic system although it is hypothesized that they had a 4 chambered heart and were warmblooded with a well functioning circulatory system. They had higher aerobic capacity and higher pressure or higher gas exchange circulatory system..