What Are the Mechanisms for maintaining Homeostasis?

Negative and Postive feedback

What is Negative feedback?

The output of the system that resloves or corrects the orginal stimulus, and helps maintain homostasis

ex: the regulation of hormone synthesis, blood glucose levels, body temperature

Brings about an increasing change in the same diection as the orginal stimulus.

ex. secretion of oxytocin during birth to continually increase uterine contractions

Away from the head end or toward the lower part of a structure or the body, below. EX: the navel is inferior to the chin

Away from the body surface; more internal EX: the lungs are deep to the skin

What are the two main body cavities located in the axial skeleton?

Cranial cavity

Verterbal Cavity

• Heart
• Lungs
• Esophagus

1. Stomach
2. liver
3. spleen
4. pancreas
5. gallbladder
6. intestines

The Reproductive organs

• Mucous membranes 
• Serous membranes 

Mucus Membranes are the linings organs covered in epithelium, which are involved in absorption and secretion. They line cavities that are exposed to the external environment and internal organs. They meet at several places with skin: such as:

• at the nostrils
•  the lips of the mouth  
• the eyelids 
• the ears 
•  the genital area  
• and the anus The sticky, 

thick fluid secreted by the mucous membranes and glands is termed mucus. 

lines organs in the

• digestive
• respiratory
• urinary
• reproductive systems

The Serous Membranes line the walls of the ventral body cavity and the outer surfaces of organs.

It is a thin double-layered membrane.

Which lines the lungs, heart, and abdominal cavity also covers the internal organs; named after their location.

1. Pleura
2. Peritoneum
3. Pericardium

Parietal peritoneum - lining of the wall of the abdominopelvic cavity

Visceral peritoneum - covers organs

Parietal pericardium  - lines the pericardial cavity

Visceral pericardium - lines the heart within the cavity

What and Where are the two Pleura Serous Membranes?

Parietal pleura - lines the walls of the thoracic cavity

Visceral pleura - covers lungs

Meninges

• Dura mater
• Arachnoid mater
• Pia mater
• 
  

head, neck, and trunk

appendages or limbs

Abdominal

Brachial

Antebrachial

 Hallux

Otic

Scapular 

Femoral