The Dermis is the second layer of skin. It is located below the Epidermis and contains our hair follicles (which sprout on the Epidermis). The Hypodermis is the lowest and largest layer, containing fat and connective tissues. The different types of sensory receptors through the skin allow us to sense contact. These receptors provide important information to the brain through sensory neurons.
To begin, the integumentary system also known as the skin, is the part of the body that meets the air. The skin is the largest organ in the body that comprises 15% of body weight. The skin has various functions, which are to regulate temperature, sensory perception, blood pressure control, excretory, and etc. One major function of the skin is to protect. The skin is the protective covering of the body that prevents the invasion of microorganisms.
Inside the chest cavity is a pair of lungs that is surrounded with membranes (pleura). Between the pleura and the lung tissue is a potential space that is lubricated with a thin layer of fluid. This keeps the pleura and the lung tissue sliding against each other and allows for lung expansion. Sometimes, conditions such as infection (pneumonia), traumatic bleeding or cancer can fill this space with inflammatory fluid, which can solidify and make the pleura adhere to the lungs. It forms a capsule that can entrap the lungs and make breathing difficult.
The parietal layer lines the inner regions of the fibrous pericardium, while the visceral layer lines the outer layer of the heart and therefore it is called epicardium. Pericardial Cavity A void space found among the two linings of serous pericardium is called pericardial cavity, which encircles the heart. Between the parietal and visceral layer is the pleural cavity, which holds the pleural fluid. About 20–30 ml in volume, this serous fluid acts as a lubricant and minimizes friction between the epicardium and parietal layer as the heart muscles expand and contract with the beating of the heart. Thus, the pericardial cavity allows the heart movement to be flexible.
This provides an additional level of toughness in this region of thick skin. Stratum granulosum This is a thin layer which consists of two to five rows of flattened rhomboid cells. The keratohyaline granules are present in the cytoplasam and this protein is the precursor of keratin. Stratum
• Key Anatomical features- The skin, nails, hair, and glands. 1. The skin- The cutaneous membrane is the toughest organ that the human body has, and it has three coating layers. One is the epidermis, the next is the dermis, and the last layer is the subcutaneous tissue known as the hypodermis. A. Epidermis - This outer layer has stratified squamous epithelium to keratinize the skin, and to make it solid and strong.
The melanocytes cells in your body produce a natural pigment called Melanin through a process called melanogenesis. The cells produce two different types of melanin i.e. eumelanin (extremely dark brown) and pheomelanin (red). Melanin will protect the body against too much absorption of ultraviolet radiation. Excess ultraviolet radiation
The integumentary system is responsible for many things, such as providing an external covering (skin) for our bodies, forming organs (sweat and oil glands), and creating tissues (nerves, connective, muscle, and epithelial). The skin is known as the largest organ of the human body. The integumentary system has numerous functions such as: protecting the body’s internal living tissues and organs, protects against invasion by infectious organisms, protects the body from dehydration, acts as a receptor for touch, pressure, pain, heat, and cold, and many more . This system works with all of the other systems of the body to maintain the internal conditions that a human body needs to function. There are numerous diseases that can afflict the integumentary system, one of them being Albinism.
The cell’s secretion help on lubricating the heart, preventing heart friction with its surrounding organs during contractions, holding the heart inside the chest and maintaining a hollow space for the heart to expand into when it is full of blood. 1.1.2 Structure of the heart wall The heart wall is composed of 3 layers (figure 3): • Epicardium: As mentioned before, the epicardium is at the same time the outermost layer of the heart wall and the inner wall of the pericardium (visceral layer). It protects and lubricates the