Week 9: Small Animal Thorax Flashcards by Allison Brown

Three properties of body cavities

Bounded by muscle and bone
Lined by serous membrane
Contain viscera

How well did you know this?

Not at all

Perfectly

Ventral body cavities are divided by the diaphragm into

Thoracic and abdominopelvic cavities

How well did you know this?

Not at all

Perfectly

Skeletal boundaries of the thoracic cavity

Dorsal: Thoracic vertebrae
Lateral: Ribs and costal cartilages
Ventral: Sternebrae and costal cartilages

How well did you know this?

Not at all

Perfectly

Cranial and caudal borders of the thoracic cavity

Cranial: Thoracic inlet
Caudal: Diaphragm

How well did you know this?

Not at all

Perfectly

Muscles of the thoracic wall are primarily used for

Respiration

How well did you know this?

Not at all

Perfectly

Muscles of the thoracic wall include (9)

Serratus dorsalis caudalis
Serratus dorsalis cranialis
External intercostals
Internal intercostals
Retractor costae
Scalenus
Rectus thoracis
Rectus abdominis
Transversus thoracis

How well did you know this?

Not at all

Perfectly

Muscular parts of the diaphragm

Right and left costal
Sternal
Lumbar with right and left crura

How well did you know this?

Not at all

Perfectly

Tendinous parts of the diaphragm

Central tendon

- Left and right crural tendons

How well did you know this?

Not at all

Perfectly

Coverings and attachments of the diaphragm

Pleural covering
Diaphragmatic line of pleural reflection
Mediastinal attachment
Plica vena cava

How well did you know this?

Not at all

Perfectly

Openings of the diaphragm

Lumbocostal arch
Aortic hiatus
Esophageal hiatus
Caval foramen

How well did you know this?

Not at all

Perfectly

Serous membranes (tunica serosa) is composed of

A secretory epithelial layer (mesothelium) and an underlying CT layer

How well did you know this?

Not at all

Perfectly

Purpose of serous membranes

Secrete serous fluids to reduce friction

How well did you know this?

Not at all

Perfectly

Serous membranes are named according to

Location and cavity they define

How well did you know this?

Not at all

Perfectly

Parietal and visceral layers are

continuous

How well did you know this?

Not at all

Perfectly

Three serous cavities within the thoracic cavity

Left pleural
Right pleural
Pericardial

How well did you know this?

Not at all

Perfectly

Pericardial cavity develops within…

continuous with…

Mediastinum: the space between the two pleural cavities

- With the cervical visceral space

How well did you know this?

Not at all

Perfectly

Five regions of the parietal pleura within the R and L pleural cavities of the thoracic cavity

Costal
Sternal
Diaphragmatic
Mediastinal
Diaphragmatic line of pleural reflection

How well did you know this?

Not at all

Perfectly

Specific visceral pleura within the R and L pleural cavities of the thoracic cavity

Pulmonary pleura

How well did you know this?

Not at all

Perfectly

Recesses of the thoracic cavity

Pleural cupula
Costodiaphragmatic
Costomediastinal
Mediastinal recess

The mediastinal recess contains

The accessory lobe of the right lung

Walls of the pericardial cavity are formed by a dense CT called the

fibrous pericardium

The fibrous pericardium is lined by

Partietal pericardium

The cervical visceral space is bounded by what muscles?

Sternocephalicus
Sternothyrohyodieus
Longus capitis
Longus coli

Contents of the visceral space include (6)

Trachae
Esophagus
Thyroid and parathyroid glands
Recurrent laryngeal nerves
Trachael lymph nodes
Carotid sheath

What is in the carotid sheath?

- Common carotid arteries - Vagosympathetic trunks - Internal jugular veins

Are the lungs in the mediastinum?

Nope

Two portions of the respiratory system

Conducting | Exchange

Conducting portion includes (2)

Trachae | Bronchial tree

Bronchial tree branches

- R and L principal bronchi - Carina - Lobar bronchi - Branches of segmental bronchi - Bronchioles

Exchange portion of the respiratory system begins at

the respiratory bronchioles

The respiratory bronchioles include

Alveolar ductules | Alveolar saccules

Trachae is composed of

Incomplete cartilaginous rings connected by tracheal (annular) ligaments

Functional blood supply to the lungs

Pulmonary a. and v.

Nutritive blood supply to the lungs

- Bronchoesophageal a. | - Azygous vein

Left lung is divided into

- Cranial: cranial and caudal parts | - Caudal

Costodiaphragmatic recess is located between

- Basal border of the lung | - Diaphragmatic line of pleural reflection

Right lung is divided into

- Cranial - Middle - Caudal - Accessory

Brachiocephalic trunk branches into

- Left common carotid - Right common carotid - Right subclavian

Branches of the descending thoracic aorta

- Dorsal intercostals | - Bronchoesophageal

Branches of the subclavian arteries

- Costocervical trunk - Vertebral - Superficial cervical - Internal thoracic

Costocervical trunk supplies

Cranial intercostal spaces of and muscles of the neck

Vertebral a. supplies

Brain, extends through transverse vertebral foramina

Superficial cervical a. supplies

Superficial structures of the neck

Internal thoracic supplies

- Ventral intercostal aa - intercostal spaces - Musculophrenic -diaphragm - Cranial epigastric - continues

Veins of the canine thorax

- Right azygous - Caudal vena cava - Cranial vena cava

Plica vena cava envelopes

Caudal vena cava | Right phrenic nerve