The skeletal system includes all of the bones and joints in the body. Each bone is a complex living organ that is made up of many cells, protein fibers, and minerals. The skeleton acts as a scaffold by providing support and protection for the soft tissues that make up the rest of the body. The skeletal system also provides attachment points for muscles to allow movements at the joints. New blood cells are produced by the red bone marrow inside of our bones.
This document summarizes information about saliva and salivary glands. It defines saliva as a complex fluid produced by salivary glands that contains 99% water as well as calcium, phosphate, fluoride, proteins, and enzymes. The functions of saliva include protection, buffering action, maintenance of tooth integrity, digestion, defense against bacteria, and taste. There are three major salivary glands - the parotid, submandibular, and sublingual glands. Salivary glands are classified based on their location, size, and the nature of their secretions. The histological structure of salivary glands includes a connective tissue framework, secretory cells that form
Epithelial tissue lines body surfaces and cavities and forms glands. It has several key characteristics: it protects underlying tissues, regenerates quickly, is avascular, and is polarized with selectively permeable cells. Epithelial tissue includes glandular epithelium which forms two types of glands - endocrine glands that release secretions into the bloodstream and exocrine glands that secrete into ducts leading outside or inside the body. Exocrine glands are classified by their secretory mechanisms and structures.
Glandular epithelium is a special type of epithelium that makes up glands in the body. Glands can be single cells or groups of cells that secrete enzymes, hormones, fats, or mucus. Their secretions are required by other tissues. There are two main types of glands: exocrine glands, which have duct systems and release secretions internally or externally; and endocrine glands, which are ductless and release hormones internally. Glands can be classified according to their presence or absence of ducts, number of secretory cells, nature of secretions, mode of secretion, and shape and arrangement of ducts.
The gallbladder has three layers:
1) A mucosa layer with a simple columnar epithelial lining and brush border to facilitate water absorption. It contains folds when empty.
2) A muscularis layer of circularly arranged smooth muscle fibers and elastic tissue to aid contraction.
3) An outer serosa/adventitia layer covered by peritoneum except where attached.
This document summarizes the histology of special sensory organs, including the olfactory mucosa, gustatory cells, retina, inner ear, and optic nerve. It describes the structure and layers of the cornea, retina, cochlea, semicircular canals, and olfactory bulb. Key cell types are also outlined, such as rod and cone photoreceptors in the retina and hair cells in the cochlea. The roles of supporting structures like the pigment epithelium and nerve fibers are highlighted.
Miscugli eterogenei ed omogenei, dissoluzione, soluzioni, concentrazione delle soluzioni, metodi di separazione. Per il primo biennio delle scuole superiori
The skeletal system includes all of the bones and joints in the body. Each bone is a complex living organ that is made up of many cells, protein fibers, and minerals. The skeleton acts as a scaffold by providing support and protection for the soft tissues that make up the rest of the body. The skeletal system also provides attachment points for muscles to allow movements at the joints. New blood cells are produced by the red bone marrow inside of our bones.
This document summarizes information about saliva and salivary glands. It defines saliva as a complex fluid produced by salivary glands that contains 99% water as well as calcium, phosphate, fluoride, proteins, and enzymes. The functions of saliva include protection, buffering action, maintenance of tooth integrity, digestion, defense against bacteria, and taste. There are three major salivary glands - the parotid, submandibular, and sublingual glands. Salivary glands are classified based on their location, size, and the nature of their secretions. The histological structure of salivary glands includes a connective tissue framework, secretory cells that form
Epithelial tissue lines body surfaces and cavities and forms glands. It has several key characteristics: it protects underlying tissues, regenerates quickly, is avascular, and is polarized with selectively permeable cells. Epithelial tissue includes glandular epithelium which forms two types of glands - endocrine glands that release secretions into the bloodstream and exocrine glands that secrete into ducts leading outside or inside the body. Exocrine glands are classified by their secretory mechanisms and structures.
Glandular epithelium is a special type of epithelium that makes up glands in the body. Glands can be single cells or groups of cells that secrete enzymes, hormones, fats, or mucus. Their secretions are required by other tissues. There are two main types of glands: exocrine glands, which have duct systems and release secretions internally or externally; and endocrine glands, which are ductless and release hormones internally. Glands can be classified according to their presence or absence of ducts, number of secretory cells, nature of secretions, mode of secretion, and shape and arrangement of ducts.
The gallbladder has three layers:
1) A mucosa layer with a simple columnar epithelial lining and brush border to facilitate water absorption. It contains folds when empty.
2) A muscularis layer of circularly arranged smooth muscle fibers and elastic tissue to aid contraction.
3) An outer serosa/adventitia layer covered by peritoneum except where attached.
This document summarizes the histology of special sensory organs, including the olfactory mucosa, gustatory cells, retina, inner ear, and optic nerve. It describes the structure and layers of the cornea, retina, cochlea, semicircular canals, and olfactory bulb. Key cell types are also outlined, such as rod and cone photoreceptors in the retina and hair cells in the cochlea. The roles of supporting structures like the pigment epithelium and nerve fibers are highlighted.
Miscugli eterogenei ed omogenei, dissoluzione, soluzioni, concentrazione delle soluzioni, metodi di separazione. Per il primo biennio delle scuole superiori
2. •
L'epidermide è il più
esterno dei due strati
(insieme al derma) che
compongono la pelle.
Istologicamente è
classificato come epitelio
pavimentoso
pluristratificato
cheratinizzato, essendo
infatti formato da cinque
strati di cellule.
3. • l derma è lo strato della
cute posto profondamente
all'epidermide, costituito da
tessuto connettivo
propriamente detto denso. Il
derma inoltre dona alla cute
le caratteristiche di
consistenza e resistenza
grazie alle abbondanti fibre
collagene.
4. • L'ipoderma o tela
sottocutanea è lo
strato più profondo
della pelle che si
trova sotto il derma
da cui non è
possibile differenziale
in maniera netta.
6. • L'acne è una malattia
della pelle ad evoluzione
benigna, caratterizzata da un
processo infiammatorio
del follicolo pilifero e
della ghiandola
sebacea annessa, chiamata in
linguaggio comune "brufolo" o
"foruncolo". Le parti più colpite
sono viso, spalle, dorso e regio
ne pettorale del torace.
7. • L'acne è una malattia
della pelle ad evoluzione
benigna, caratterizzata da un
processo infiammatorio
del follicolo pilifero e
della ghiandola
sebacea annessa, chiamata in
linguaggio comune "brufolo" o
"foruncolo". Le parti più colpite
sono viso, spalle, dorso e regio
ne pettorale del torace.