Internal Surfaces of the Body
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Internal Surfaces of the Body - Marcador
Internal Surfaces of the Body - Detalles
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19 preguntas
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| What is a mucous membrane and some examples? | Lines tubes that open to exterior and examples are GI tract, Urinary tract, Reproductive tract and Respiratory tract |
| What are the 3 layers of the mucous membrane | 1. Epithelium lining 2. Adjacent layer of the lamina propria 3. Third layer present in the GI tract and is made up of smooth muscle cells |
| What are serous membranes? | 2 part membrane and are thin and line certain closed cavities |
| What are the 3 structures that the serous membrane lines? | Pleural sac ( lung ) Pericardial sac ( heart ) Peritoneum ( many abdominal organs ) |
| What is the role of the serous fluid | Lubrication so that organs involved in digestion can move friction-free |
| What is a Mesentery | Double layer of peritonuem that supplies blood, nerves and lymph. It also a site of fat storage |
| What are the 4 layers of a gut tube | 1. Mucosa layer 2. Sub muscosa 3. Muscularis externa 4. Outer serosa |
| What is the serosa composed of and function ( what epithelium ) in the illeum | Simple squamous epithelium and secretes watery lubricant which provides blood vessels and nerves |
| What are the layers of the oesphagus | Mucosa layer --> stratified squamous non-keratinised epithelium, lamina propria and some smooth muscles and a lot of immune cells Submucosa --> connective tissue containing mucus secreting glands Muscularis externa --> inner are circular and outer are longtidunal muscles |
| What are the 4 layers of the stomach | Cardia Fundus Body Pyolrus |
| What are the functions of each layer of the stomach | Cardia - Mucus production Fundus - Produce gastric juice Body - Produce gastric juice Pyolrus- Mucus production |
| How can you differentiate between jejunum and illeum | Jejunum contains more abundant plicae Jejunum also has absnece of Brunners and Peyer patches |
| What is a Peyer patch | Large patches of lymphoid follicles found in illeum that provides immune surviellence |
| What is the difference between small intestine and large intestine | LI contains no plicae and no villi Abosrbs water and electrolytes Musclaris externa changes from longtidunal into 3 bands called the taenia coli |
| In the trachea, what muscle helps you cough and swallow | Trachealis muscle |
| What are the 2 types of pneumocytes present in the alveoli | Type I ( simple squamous ) permits gas exchange Type II ( cuboidal ) produces surfactants that lower surface tension |
| What kind of epithelium is found in the Ureter and urethra | Transitional Epithelium |
| What is the role of the adventia | Connective tissue that holds organs in place |