10. Skeleton
The bones of our body make up a skeleton. The skeleton forms about 18 % of the weight of the human body.
The skeleton of the trunk mainly consists of spinal column made of a number of bony segments called vertebrae to which the head, the thoracic cavity and the pelvic bones are connected. The spinal column consists of 26 spinal column bones.
The human vertebrae are divided into differentiated groups. The seven most superior of them are the vertebrae called the cervical vertebrae. The first cervical vertebra is the atlas. The second vertebra is called the axis.
Inferior to the cervical vertebrae are twelve thoracic vertebrae. There is one rib connected to each thoracic vertebrae, making 12 pairs of ribs. Most of the rib pairs come together ventrally and join a flat bone called the sternum.
The first pairs or ribs are short. All seven pairs join the sternum directly and are sometimes called the "true ribs". Pairs 8, 9, 10 are "false ribs". The eleventh and twelfth pairs of ribs are the "floating ribs".
Inferior to the thoracic vertebrae are five lumbar vertebrae. The lumbar vertebrae are the largest and the heaviest of the spinal column. Inferior to the lumbar vertebrae are five sacral vertebrae forming a strong bone in adults. The most inferior group of vertebrae are four small vertebrae forming together the ñîññóæ.
The vertebral column is not made up of bone alone. It also has cartilages.
New words
skeleton - ñêåëåò
make up - ñîñòàâëÿòü
weight - âåñ
trunk - òóëîâèùå
vertebrae - ïîçâîíî÷íèê
thoracic cavity - ãðóäíàÿ êëåòêà
pelvic - òàçîâûé
cervical - øåéíûé
atlas - 1 øåéíûé ïîçâîíîê
sternum - ãðóäèíà
mainly - ãëàâíûì îáðàçîì
axis - îñü
spinal column - ïîçâîíî÷íèê
inferior - íèæíèé
rib - ðåáðî
pair - ïàðà
sacral - ñàêðàëüíûé
ñîññó"- êîï÷èê
floating - ïëàâàþùèé
forming - ôîðìèðóþùèé
cartilage - õðÿù
lumbar - ïîÿñíè÷íûé
adult - âçðîñëûé
Àâòîð: Åëåíà Áåëèêîâà
<< Íàçàä: Muskular system
>> Âïåðåä: Muscles
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Îñîáåííîñòè LIS3DHH:
3-îñè, ±2.5 g ïîëíàÿ øêàëà
Óëüòðàíèçêèé øóì: 5 ìêg/vHz
Îòëè÷íàÿ òåìïåðàòóðíàÿ ñòàáèëüíîñòü: <0.4 mg/°C
Âûõîäíûå äàííûå 16-áèò
Öèôðîâîé èíòåðôåéñ SPI 4-wire
Âûõîä òåìïåðàòóðíîãî äàò÷èêà 12 áèò
Âñòðîåííûé FIFO (ãëóáèíîé 32 óðîâíÿ)
Óñòîé÷èâîñòü ê âûñîêèì ïåðåãðóçêàì
Òåìïåðàòóðà -40 °C ... +85 °C
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