Exam 3: Respiratory, Circulatory, Digestive Flashcards
gill arch, 1 side has filaments/lamellae?
Hemibranch
2 rows of lamellae/filaments?
Holobranch
looks like there is a branch but there isn’t?
Psudobranch
Prevents food particles from entering?
Gill rakers
what do internal gills develop from?
the pharynx; as evaginations called pharyngeal pouches
Branchial arch carrying two rows of respiratory lamellae/filaments?
Holobranch
lamellae/filaments only on one side
Hemibranch
resembles a gill in structure?
Pseudobranch
Which chamber on the posterior wall has no demibranch?
5th chamber
how many ‘naked’ gill slits are there?
5
What has to be included in a structure for it to be Holobranch?
- 2 Demibranches
+ - Septum &
associated cartilage - Blood vessels
- Muscles
- Nerves
Where does the interbrachial septum lie between?
Between 2 demibranches of a gill arch
Anterior & posterior walls of which gill chambers have a gill surface? (Demibranch)
1st - 4th
What are the 3 types a septum can be?
full/complete, partial, or none
How many gill slits does a bony fish have?
5
What is the cover over the gills called on a bony fish?
Operculum
Teleost =?
Bony fish
What are the gill characteristics of a Bony Fish?
no septum and free demibranches; teleost
What does a swim bladder do?
serves as hydrostatic organ
What does a hydrostatic organ do?
regulates fish specific gravity
Open/function for respiration (bowfin/lungfish)
Physostomous
Closes off/ NOT function for respiration (teleost)
Physoclistous
Directly connected to digestive tract
Physostomous
NOT directly connected to digestive tract
Physoclistous
Diffuses gas from blood
swim bladder
Muscles attached to the swim bladder contract to move air over the bladder. vibration creates sound in fish
sound production
swim bladder of lungfish has number subdivisions or septa (to increase surface area) & O2 and CO2 is exchanged between the bladder & blood
respiration
pressure waves via swim bladder and small bones called Weberian ossicles
hearing
What things help a fish to hear
swim bladder and Weberian ossicles (small bones)
Amphibians have what kind of pressure breathing?
positive pressure ventilation
How many air sacs do amphibians have?
2 simple sacs
Respiration through the skin
cutaneous respiration
Primary respiratory mode during colder temps
cutaneous respiration
Scales prevent cutaneous respirations
reptiles
Underwater hibernation - Cloaca cutaneous respiration in :
turtles
Thick skin prevents cutaneous respirations
mammals
What animals have simple sacs and NO diaphragm?
snakes and lizards
Crocodiles have a diaphragm true or false?
True
Hard shell makes expansion hard
turtles
Must use limbs for lung ventilation?
turtles
How do turtles respire?
Expels air from lungs by pushing their limbs out of shell then expands lungs
Have complex lungs with large surface areas and volume
turtle
Air sacs distributed throughout most of the body
Avian (Bird)
Where gas exchange takes place
Parabronchi
Unidirectional flow, no dead end spaces
Arrangement
What composes the upper respiratory system?
Nose, nasal cavity, paranasal sinuses, and pharynx
What composes the lower respiratory system?
Larynx, trachea. bronchi, and lungs
Paired arytenoid/Cricoid/Thyoid/small cartilages/epiglottis
Mammals
2 pair cartilages: Arytenoid/Cricoid
Tetrapods
Which classes of animal have vocal cords
amphibians/lizards/most mammals
What animals have a syrinx
Aves (vocal cord of a bird)
True vocal cords contain no blood vessels, true or false?
True; they obtain oxygen from false vocal cords
Runs length of neck
trachea
Cartilaginous rings
trachea
Tracheal bifurcation
trachea
The act/process of inhaling (O2 from external environment) and exhaling (CO2)
respiration
Pumping of water in gills and air in lungs
ventilation
Environment exchange
external respiration
Exchange with tissues
internal respiration
Exchange through the skin
cutaneous respiration
Fissure is divided into 2 parts
Superior and inferior
IN thoracic cavity
lungs
Primary structure - alveoli
lungs
Indentation on lungs
Helium
Superior tip: Base - Inferior surface (rests on diaphragm)
Apex
Concavity for heat
Cardiac notch
Left lung is smaller or bigger than the right?
smaller than the right lung
Separated into superior & inferior lobes by oblique fissure
Left lung
Superior, middle, inferior lobes separated by oblique & horizontal fissures
Right lung
Thin, double-layered serous membrane
Pleurae
Covers inner surface of thoracic wall (heart & lungs) & extends over diaphragm
Parietal pleura
Inner layers on tip of lungs (external lung surface)
Visceral pleura
Provides lubrication & reduces surface friction to assist in expansion & recoil
Pleural fluid
The pleura cavity each contains how many lung
1 lung
What are the steps of Neg Pressure breathing
Breathing in:
1. Chest expands
2. Diaphragm contracts downward
Breathing out:
1. Chest contracts downward
2. Diaphragm relaxes and goes back up
What does the vertebrate circulatory system transport?
Gases
Nutrients
Waste
Hormones
What does the vertebrate circulatory system consist of?
Aortic arches
Arteries
Capillaries
Veins
Heart
Arteries carry blood to the heart or away from the heart?
Away from the heart
Veins carry blood to the heart or away from the heart?
To the heart
Deoxygenated blood is still what % oxygenated?
75%
Aortic arches are found where?
Within pharyngeal arches
What are the characteristics of arteries?
*Carries blood away from heart
*Muscular, elastic fibrous walls
*Regulates blood pressure
*Terminate in capillary bed
What are the characteristics of veins?
*Carry blood toward heart
*Less muscle in walls, but are elastic
*Valves in some vertebrate
*Begin at the end of capillary beds
What are the characteristics of the heart?
*Modified blood vessels
*Muscular pump (cardiac muscle)
*Pacemaker - SA node (sets rhythm of heart)
Horses DO NOT have valves, true or false?
True
Oxygen (O2) and Carbon Dioxide (CO2) blood exchange will take place at what level?
Capillary level
How many aortic arches are there?
6 aortic arches
Vessel carrying the blood from the heart to the early aortic arches
Truncus arteriosus and bulbus cordis
Leads to the 6th aortic arches
Pulmonary trunk
Leads to the 3rd and 4th aortic arches
Aortic trunk
Shunts blood away from the lungs and into the dorsal aorta
Ductus arteriosus
Supplies the embryonic respiratory membranes with blood
Dorsal aorta
Which aortic arches are lost in a Teleost?
1st and 2nd
What does the dorsal aorta become in Teleost’s?
The internal carotids
What aortic arches are lost in tetrapods?
1st, 2nd, and 5th
In tetrapods, which arch does the pulmonary artery stem from?
6th arch (Dorsal segment is lost)
The dorsal segment is dropped between which arches in tetrapods?
3rd and 4th
Where is the common carotid found on a tetrapod?
Between 3rd and 4th arches
Where does the ventral aorta extend into in tetrapods?
The external carotid
Which arches are lost in Reptiles?
1st, 2nd, and 5th
Connects pulmonary artery and descending aorta ****
Ductus arteriosus
The ductus Coroticus is lost in which animals?
Reptiles
The Ductus arteriosus is lost in which animals?
Reptiles
In reptiles how are the aortic arches laid?
The left side loops right
The right side loops left
What does the aortic arches being looped help with in reptiles?
It creates a spiral to start to keep blood separated
In mammals which aortic arches are retained embryonically?
3rd, 4th, and 6th
Which aortic arches are lost in adult mammals?
1st, 2nd, and 5th
The 3rd carotid arch is found in which animals?
Mammals
The 4th systemic arch is found in which animals?
Mammals
True or False: the dorsal segment of the 6th aortic arch is lost in mammals?
True
Becomes the ligamentum arteriosum in mammals
Ductus arteriosus
Which animals have a right aortic arch and have lost the left?
Birds
Mammals have a ____ aortic arch
Left aortic arch
What are the primary venous channels?
Cardinals (embryonically)
Renal portal
Lateral abdominals
Hepatic portals
Coronary veins
Pulmonary veins (higher vertebrate)
Posterior Vena Cava (higher vertebrate)
Receives blood from head
Anterior
Receives blood from kidneys
Posterior
Directs blood to sinus venosus
Common
What does the sinus venosus turn into?
The SA node (pacemaker)
Receives blood from abdominal stream to iliac
Lateral abdominals
Receives blood from caudal vein
Renal portal