body a means to transfer nutrition from the external environment into the cellular level in order to sustain life. Salivary glands‚ controlled by the autonomic nervous system‚ are located in the oral cavity. Its main role is to secrete saliva in the oral cavity. There are three pairs of salivary glands. Parotoid savary gland lies under the skin on each side of the mandible. These glands secrete amylase‚ an enzyme that breaks down starches. The parotoid duct implies empties into the vestibule at the
Premium Digestion Stomach Liver
still have too few answers to many questions: "Why can we not predict who will get the disease?" "Why do we not become immunized?" "How much saliva is enough?" or "Which salivary components are protective?" and "Which salivary components predispose for caries?" It is generally accepted‚ however‚ that saliva secretion and salivary components secreted in saliva are important for dental health. The final result‚ "caries to be or not to be"‚ is a complex phenomenon involving internal defense factors‚
Premium Dental caries Tooth enamel
Regulate metabolism and water and mineral balance * Respond to external stimuli * Exocrine glands: secrete substances ( water/enzymes/ mucus) through tube like ducts. * The ducts transport the substances to specific locations inside and outside the body. Ex. Liver‚ sweat glands‚ mucus glands‚ salivary glands‚ other digestive glands The endocrine system consists of: * Endocrine glands: ductless organs
Premium Endocrine system Hormone Endocrine gland
horn of gray matter and neurotransmitter at skeletal muscle is Ach. Visceral motor comes from cranial nerves or intermediolateral gray horn‚ involves 2 neurons and the neurotransmitter is either Ach or NE at either cardiac muscle‚ smooth muscle or glands. Somatic motor vs Visceral motor Visceral reflexes ■ Unconscious automatic control of visceral activities. Increased BP HR decreases Autonomic Nervous System Motor nervous system to visceral organs ■ Two divisions: 1. Sympathetic “Fight
Premium Nervous system Acetylcholine Sympathetic nervous system
THE DIGESTIVE SYSTEM OF CHICKEN In most livestock‚ teeth function to grind feed into smaller particles. Birds must pass feed usually whole into the esophagus because they do not have teeth. Therefore‚ particles of poultry feed should be small enough to pass through the esophagus. Feed passes from the mouth and through the precrop esophagus to the crop. If the proventriculus and gizzard are full‚ feed is stored in the crop. Feed is also moistened in the crop. Feed passes from the crop through the
Free Digestion Digestive system Stomach
travels though the digestive tract by muscle contraction called peristalsis. This journey of digestion can take up to twenty four hours. Digestion begins in the mouth where the teeth break food down into smaller particles during mastication. Salivary glands secrete saliva which begins chemical digestion and keeps the food moist. Swallowed food is pushed into the pharynx by the contraction of multiple muscle of the face‚ neck and tongue. The soft palate blocks the upper pharnx to prevent the food
Free Digestion
the jaws and teeth and within the stomach and the intestine this is by the churning action of the muscular walls. Chemical digestion is by a series of specific enzymes in which are produced within numerous regions of the alimentary canal. The salivary glands produce an enzyme called amylase which breaks down polysaccharides into simpler sugars. These enzymes then hydrolyse the chemicals within the larger food molecules by breaking them down into very tiny constituent molecules. In the mouth the
Premium Digestion Blood Stomach
sigmoid colon‚ rectum‚ vermiform appendix and anus are all part of the alimentary canal. The function of the alimentary canal is to provide nourishment. The teeth‚ tongue‚ gallbladder‚ salivary glands‚ liver and pancreas are considered to be accessory digestive organs. These organs produce saliva (salivary glands)‚ bile (gallbladder and liver) and digestive enzymes which contribute to the breakdown process of food. Mechanical digestion begins with the process of taking food into the mouth or
Premium Digestion Liver
also accessory digestive organs involved including the salivary glands‚ liver‚ pancreas‚ and gallbladder. Digestion begins in the oral cavity where the cheeks and lips press the food against the teeth‚ a process known as mastication. This is the first phase of mechanical digestion which is also aided by the tongue. There are three major pairs of salivary glands that secrete approximately 1 liter
Premium Digestion Stomach Small intestine
4000310515center22 de Septiembre de 2014 330009500022 de Septiembre de 2014 420003263900880008851265Daniela Garcia Paez. UVM Campus Puebla 31 bb.450000Daniela Garcia Paez. UVM Campus Puebla 31 bb.420003263900175001760220Proyecto 1° ParcialBiology.450000Proyecto 1° ParcialBiology. right223266000 The Human genome is a complement of genetic material that is found in the human cell. Though there are over a billion people in the world today‚ there are only minute differences between genomes‚ which
Premium DNA Genetics Human genome