Part 5 (5/7): Salivary glands [Upper Gastrointestinal Tract Organs]

Salivary glands produce what?

they produce saliva

Where are the salivary glands located?

they are located within and outside of the oral cavity

Intrinsic salivary glands are located where?

they are located within the oral cavity

Intrinsic salivary glands are what type of glands?

they are unicellular glands

Intrinsic salivary glands continuously release secretions independently of what?

independently of food

Intrinsic salivary glands contain what type of lipase?

they contain lingual lipase

What are lingual lipase in Intrinsic salivary glands?

they are enzymes that begins lipid digestion

Extrinsic salivary glands produces what?

they produce most saliva

Extrinsic salivary glands are what type of salivary glands?

they are parotid salivary glands

Where are Extrinsic salivary glands located at?

they are located anterior and inferior to the ear

What percent of saliva is produced in Extrinsic salivary glands?

25-30% of saliva is produced in Extrinsic salivary glands

Submandibular salivary glands are located where

are located inferior to oral cavity floor and medial to mandible

What percent of saliva is produced in the submandibular salivary glands?

60-70% of saliva is produced in the submandibular salivary glands

Sublingual salvary glands are located where?

they are located inferior to the tongue

Sublingual salivary glands contribute to what percent of saliva created?

it contributes only 3-5 of saliva

What are the two secretory cells within salivar glands?

* Mucous cells
* Serous cells

Mucous cells secrete what?

they secrete mucin

Mucous cells secrete mucin, forming what upon hydration?

forming mucus upon hydration

Serous cells secrete a watery fluid containing what?

a watery fluid containing electrolytes and salivary amylase

Serous cell secrete watery fluid containing electrolytes and salivary amylase similar to what?

similar to blood plasma

How many liters of saliva is secreted daily?

1\.0-1.5 L of saliva is secreted daily

Saliva is most produced during what time?

it is most produced during mealtime

Saliva is a mixture of what?

is a mixture of water and solutes

What percent of saliva is water and a mixture of solutes?

99\.5% of saliva is water and a mixture of solutes

What does saliva do to ingested foods to help them become bolus?

saliva moistens ingested food to help become bolus

Saliva initiates chemical breakdown of what?

it initiates chemical breakdown of starch (salivary amylase)

Food molecules are dissolved in saliva so what can be stimulated?

so taste receptors can become stimulated

Saliva does what to the oral cavity structures?

it cleanses oral cavity structures

Antibacterial substances in saliva inhibit what type of growth?

they inhibit bacterial growth (lysozyme, antibodies)