当前课程知识点：Animal Anatomy > Chapter 4 The Digestive System > Section 4 Single Chamber Stomach > Single Chamber Stomach-Video
同学们好
今天讲述的是单胃
具有单胃的动物很多
例如马属动物
马和驴 猪 犬 猫等
首先观察马属动物的胃
它也叫单室胃
胃在体内的位置它比较靠前
表面分为壁面和脏面
壁面是朝前的
与膈和肝脏相邻
脏面朝后
接大结肠 空肠和胰
马胃的黏膜它分为腺部和无腺部
在无腺部没有消化腺
黏膜是苍白的
它占整个胃盲囊
和幽门口以上的胃黏膜区
腺部的黏膜附有皱褶
呈红褐色或灰色
内有丰富的贲门腺
胃底腺和幽门腺
幽门黏膜会形成一个环形褶
称为幽门瓣
可以防止食物逆流
连接胃的韧带和网膜有很多
起着固定胃的作用
例如胃膈韧带
是连接胃大弯和膈之间的浆膜褶
大网膜它是由两层浆膜褶构成
位于胃和大结肠之间
附着于胃大弯 十二指肠起始部
大结肠末端和小结肠起始部
胃脾韧带是连接于
胃大弯和脾门之间的
也是大网膜的一部分
小网膜连接于胃小弯
于十二指肠起始部与肝门之间
其中连于胃的部分为胃肝韧带
连系于十二指肠的部分为
肝十二指肠韧带
以上是马属动物的胃
下面我们看一下猪的胃
也是单室胃
但比马胃的相对容积大
胃的左端大而圆突
有一盲突称胃憩室
在右端幽门部较细
在幽门处自小弯一侧
胃壁向胃的内腔突出
呈一纵向长的鞍形隆起
称为幽门圆枕
它与对侧的唇形隆起是相对的
具有关闭幽门的作用
也是防止食物的逆流
猪胃的黏膜面也分为
无腺部和有腺部
无腺部很小
仅位于贲门周围 呈苍白色
贲门腺区很大
由胃的左端达到中间 呈淡灰色
胃底腺区较小
沿胃大弯分布 呈棕红色
幽门腺区位于幽门部 呈灰白色
以上学习的是猪的胃
下面我们看一下犬的胃
犬胃容积比较大 呈弯曲的梨形
左端膨大
由胃底部和贲门构成
位于左季肋区
右侧为幽门部 呈细的圆筒状
位于右季肋区
两者之间为胃体
犬胃的黏膜全部是有腺体
属于腺型胃
有腺部分为贲门腺区
幽门腺区和胃底腺区
贲门腺区很大 呈红褐色
约占全胃容积的三分之二
幽门腺区较小 呈灰白色
二者之间为胃底腺
那么我们比较了马 猪和犬的
三个动物的它的单胃结构
以及黏膜面的特征
大家思考一个问题
动物的胃黏膜不同的原因是什么
关于单胃的知识就讲到这里
再见
-Introduction
-Introduction-Homework
-Section 1 General Introduction to Bone
--General Introduction to Bone-1-Video
--General Introduction to Bone-2-Video
-General Introduction to Bone-Homework
-Section 2 Skull
-Skull-Homework
-Section 3 Torso Bone
-Torso Bone-Homework
-Section 4 Forelimb Bone
-Forelimb Bone-Homework
-Section 5 Hindlimb Bone
-Hindlimb Bone-Homework
-Section 6 Overview of Bone Connection
--Overview of Bone Connection-Video
-Overview of Bone Connection-Homework
-Section 7 Whole Body Bone Connection
--Whole Body Bone Connection-Video
-Whole Body Bone Connection-Homework
-Section 8 Muscle Overview
-Muscle Overview-Homework
-Section 9 Whole Body Muscles
-Whole Body Muscles-Homework
-Introduction of Viscera
--Introduction of Viscera-Video
-Introduction of Viscera-Homework
-Sction 1 Oral Cavity
-Oral Cavity-Homework
-Section 2 Salivary Glands
-Salivary Glands-Homework
-Section 3 Ruminant Stomach
-Ruminant Stomach-Homework
-Section 4 Single Chamber Stomach
--Single Chamber Stomach-Video
-Single Chamber Stomach-Homework
-Section 5 Intestine
--Intestine of Bovine and Sheep
-Intestine-Homework
-Section 6 Liver and Pancreas
-Liver and Pancreas-Homework
-Section 1 Nose, Pharynx and Larynx
--Nose, Pharynx and Larynx-Video
-Nose, Pharynx and Larynx-Homework
-Section 2 Trachea, Bronchus and Lung
--Trachea, Bronchus and Lung-Video
-Trachea, Bronchus and Lung-Homework
- The Urinary System
-The Urinary System-Homework
-Section 1 Female Reproductive System
--Female Reproductive System-Video
-The Female Reproductive System--Homework
-Section 2 Male Reproductive System
--Male Reproductive System-Video
-The Male Reproductive System-Homework
-Section 1 Introduction of the Cardiovascular System
--Introduction of the Cardiovascular System-Video
-Introduction of the Cardiovascular System--Homework
-Section 2 Heart
-The Heart--Homework
-Section 3 Arteries
-The Vessels--Homework
-Section 4 Veins
-The Veins--Homework
-The Cardiocascular System-PPT
-Section 1 Composition of Lymphatic System
--Compositiion of Lymphatic System-Video
-Composition of the Lymphatic System--Homework
-Section 2 Central Lymphoid Organs
--Central Lymphoid Organs-Video
-The Central Lymphoid Organs--Homework
-Section 3 Peripheral Lymphoid Organs
--Peripheral Lymphoid Organs-Video
-The Peripheral Lymphoid Organs--Homework
-Section 1 Overview of Nervous System
--Overview of Nervous System-Video
-Overview of Nervous System--Homework
-Section 2 Spinal Cord
-Spinal Cord--Homework
-Section 3 Brain
-The Brain--Homework
-Section 4 Spinal Nerve
-Spinal Nerve--Homework
-Section 5 Brain Nerve
-Brain Nerves--Homework
-Section 6 Vegetative Nerve
-Vegetative Nerve--Homework
-Section 1 Overview of Endocrine System
--Overview of Endocrine System-Video
-Overview of Endocrine System--Homework
-Section 2 Endocrine Organs
-Endocrine Organs--Homework
-Section 3 Pineal Gland
-Pineal Gland--Homework
-Section 4 Thyroid Gland
-Thyroid Gland--Homework
-Section 5 Parathyroid Gland
-Parathyroid Gland--Homework
-Section 6 Adrenal Gland
-Adrenal Gland--Homework
-Section 7 Endocrine Tissues
-Endocrine Tissues--Homework
-Section 1 Visual Organs
-The Visual Organs--Homework
-Section 2 Auditory Organs
-Auditory Organs--Homework
-Section 1 Skin and Hair
-Skin and Hair--Homework
-Section 2 Hoof and Horn
-Hoof and Horn--Homework
-Section 3 Mammary Gland
-Mammary Gland--Homework
-Section 1 Locomotor System
--Locomotor System of Avian-Video
-Locomotor System--Homework
-Section 2 Digestive System
--Digestive System of Avian-Video
-Digestive System--Homework
-Section 3 Respiratory and Urinary System
--Respiratory and Urinary System of Avian-Video
-Respiratory and Urinary System--Homework
-Section 4 Reproductive System
--Reproductive System of Avian-Video
-Reproductive System--Homework
-Section 5 Cardiovascular and Lymphatic System
--Cardiovascular and Lymphatic System of Avian-Video
-Cardiovascular and Lymphatic System--Homework
-Section 6 Endocrine and Nervous System
--Endocrine and Nervous Sysem of Avian-Video
-Endocrine and Nervous System--Homework
-Section 7 Sensory and Integumentary System
--Sensory and Integumentary System of Avian-Video
-The Sensory and Integumentary System--Homework
-The Anatomical Characteristics of Avian-ppt
-The Final Examination·
